--- product_id: 53261582 title: "StonyLab Borosilicate Glass 3 Neck Round Bottom Flask RBF, with 24/40 Center and Side Standard Taper Outer Joint – 250ml" brand: "stonylab" price: "₨1706" currency: SCR in_stock: true reviews_count: 13 category: "Stonylab" url: https://www.desertcart.sc/products/53261582-stonylab-borosilicate-glass-3-neck-round-bottom-flask-rbf-24 store_origin: SC region: Seychelles --- # 24/40 standard taper joints for versatile setups high borosilicate glass resists heat & chemicals 3 necks for multitasking StonyLab Borosilicate Glass 3 Neck Round Bottom Flask RBF, with 24/40 Center and Side Standard Taper Outer Joint – 250ml **Brand:** stonylab **Price:** ₨1706 **Availability:** ✅ In Stock ## Summary > ⚗️ Elevate your lab game with triple-neck precision! ## Quick Answers - **What is this?** StonyLab Borosilicate Glass 3 Neck Round Bottom Flask RBF, with 24/40 Center and Side Standard Taper Outer Joint – 250ml by stonylab - **How much does it cost?** ₨1706 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/53261582-stonylab-borosilicate-glass-3-neck-round-bottom-flask-rbf-24) ## Best For - stonylab enthusiasts ## Why This Product - Trusted stonylab brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Optimal 250ml Capacity:** Perfectly sized for precise heating, mixing, distillation, and reflux tasks in professional lab environments. - • **Universal 24/40 Joints:** Standard taper outer joints on center and sides guarantee seamless compatibility with your existing lab glassware. - • **Triple-Necked Efficiency:** Simultaneously connect thermometers, condensers, and more for complex experiments without interruption. - • **Confidence-Backed Warranty:** 1-year coverage ensures peace of mind—prompt replacement if damaged on arrival. - • **Premium Borosilicate Durability:** Crafted from high-grade 3.3 borosilicate glass, ensuring superior resistance to acids, alkalis, and thermal shock. ## Overview The StonyLab 250ml 3 Neck Round Bottom Flask is a high-quality borosilicate glass vessel designed for advanced chemical lab work. Featuring three 24/40 standard taper joints, it enables simultaneous use of multiple instruments, while its durable glass withstands high temperatures and corrosive substances. Ideal for heating, mixing, distillation, and reflux, this flask combines professional-grade functionality with reliable warranty support. ## Description StonyLab Borosilicate Glass 3 Neck Round Bottom Flask RBF, with 24/40 Center and Side Standard Taper Outer Joint – 250ml: desertcart.com: Industrial & Scientific Review: 3 necks better then 2 - They work great and good quality. Review: nice glass - as expected, typical size for 3 neck. removed one star because stony lab glass doesn't accept joint clips, the joint ring is too wide. every other brand accepts the normal joint clips. ## Features - Commonly used for heating, mixing, distillation, reflux, and storage in chemical laboratories - Features three necks for simultaneous use of thermometers, condensers, and other lab glassware, making it suitable for complex experimental setups - Constructed from high borosilicate 3.3 glass with excellent transparency, resistance to acids, alkalis, and high temperatures, ensuring long-term stability - 3 Angled Neck; 250ml capacity; 24/40 Center Joint in the central and double sides - Warranty: 1-year coverage period for your peace of mind, if received damaged, please let us know and we will solve it promptly ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B076GQHMF7 | | Best Sellers Rank | #220,516 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #29 in Lab Boiling Flasks | | Bottom Shape | Round | | Brand | stonylab | | Brand Name | stonylab | | Capacity | 250 ml | | Customer Reviews | 4.2 out of 5 stars 94 Reviews | | Manufacturer | StonyLab Scientific | | Material | Glass | | Material Type | Glass | | Model Number | US-RBF-3Neck-Glass-250ml | | Number of Items | 1 | | Part Number | US-RBF-3Neck-Glass-250ml | | Shape | Round | ## Product Details - **Bottom Shape:** Round - **Brand:** stonylab - **Capacity:** 250 Milliliters - **Manufacturer:** StonyLab Scientific - **Material:** Glass ## Images ![StonyLab Borosilicate Glass 3 Neck Round Bottom Flask RBF, with 24/40 Center and Side Standard Taper Outer Joint – 250ml - Image 1](https://m.media-amazon.com/images/I/61qNVnIPVxL.jpg) ![StonyLab Borosilicate Glass 3 Neck Round Bottom Flask RBF, with 24/40 Center and Side Standard Taper Outer Joint – 250ml - Image 2](https://m.media-amazon.com/images/I/51eOR3KqwnL.jpg) ![StonyLab Borosilicate Glass 3 Neck Round Bottom Flask RBF, with 24/40 Center and Side Standard Taper Outer Joint – 250ml - Image 3](https://m.media-amazon.com/images/I/61vJMZ5VudL.jpg) ![StonyLab Borosilicate Glass 3 Neck Round Bottom Flask RBF, with 24/40 Center and Side Standard Taper Outer Joint – 250ml - Image 4](https://m.media-amazon.com/images/I/61RpTQRKrVL.jpg) ![StonyLab Borosilicate Glass 3 Neck Round Bottom Flask RBF, with 24/40 Center and Side Standard Taper Outer Joint – 250ml - Image 5](https://m.media-amazon.com/images/I/81ouheZi+WL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ 3 necks better then 2 *by I***I on October 30, 2024* They work great and good quality. ### ⭐⭐⭐⭐ nice glass *by W***T on December 7, 2018* as expected, typical size for 3 neck. removed one star because stony lab glass doesn't accept joint clips, the joint ring is too wide. every other brand accepts the normal joint clips. ### ⭐⭐⭐⭐⭐ Good design, came right on time, solid build. *by B***O on April 2, 2018* This flask did exactly what I needed it for, and it didn't break under the around 400°c I needed to distill mercury. Furthermore, it did withstand the boiling mercury which I was slightly worried about. All in all, a worth buy and I would recommend it to anyone who needs a 500mL 3 neck. ## Frequently Bought Together - StonyLab Borosilicate Glass 3 Neck Round Bottom Flask RBF, with 24/40 Center and Side Standard Taper Outer Joint – 250ml - StonyLab Glass 24/40 Erlenmeyer Flask, Borosilicate Glass Heavy Wall Flask with 24/40 Standard Taper Outer Joint, 250ml - StonyLab Borosilicate Glass Graham Condenser with 24/40 Joint 300 mm Jacket Length Lab Glass Condenser --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sc/products/53261582-stonylab-borosilicate-glass-3-neck-round-bottom-flask-rbf-24](https://www.desertcart.sc/products/53261582-stonylab-borosilicate-glass-3-neck-round-bottom-flask-rbf-24) --- *Product available on Desertcart Seychelles* *Store origin: SC* *Last updated: 2026-09-03*