What type of plastic are these made out of?

Typical plastic gears. Not a hard rubber. Good to have if you ever need a backup.

What size hole is in the gears? Are they all the same?

they vary from.0625 or 1/16 to .115 or 2.875mm that not any standard everything is +or- .003 there is no standard that they match,the plus or minus .003 is the test on my parts that i have

i need a double gear with 22 teeth at 14mm diameter and 12teeth at 10mm do you have please?

Hi thanks for your question. This is link of the size and specification of each gear → https://mega.nz/#F!BdpFVaZA!QzSstICCpv1_ZAt5UIaAPQ Any other question please feel free to contact us through email kuyiuss@outlook.com. We will always happy to help you out. Thank you!

ddoes this work for a goovi d380 ?

Hi, thanks for your question. This is the the size and specifications of each gear. Please have a look. https://mega.nz/#F!BdpFVaZA!QzSstICCpv1_ZAt5UIaAPQ

Plastic Gear Set 75pcs Single Double Reduction Gear Worm Gear

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Description

⚙️ Unlock your inner engineer with the ultimate gear set for next-level DIY projects!

STEM READY KIT - Perfect for science labs, educational projects, and hobbyists aiming to build robots or model cars.
COMPACT COMPLETE - A comprehensive set that eliminates the need for multiple purchases—everything you need in one box.
BOOST YOUR INNOVATION - Elevate your DIY builds with gears designed to handle complex transmissions and reductions.
PRECISION ENGINEERING - High-quality plastic ensures smooth, reliable gear meshing for flawless mechanical projects.
ALL IN ONE GEAR ARSENAL - 75 versatile plastic gears including crown, single, double, worm, and belts for endless DIY creativity.

The AUKUYEE Plastic Gear Set includes 75 high-quality plastic gears—crown, single, double, worm, and belts—designed for DIY car and robot projects. Ideal for STEM education and hobbyists, this comprehensive kit supports complex gear reductions and smooth mechanical transmissions, making it a must-have for innovative builders.

Specifications

ASIN	B06XCG24HZ
Best Sellers Rank	#82,895 in Toys & Games ( See Top 100 in Toys & Games ) #15 in Toy Interlocking Gear Sets
Brand Name	AUKUYEE
Customer Reviews	4.1 4.1 out of 5 stars (342)
Included Components	GEARS
Manufacturer	AUKUYEE
Material Type	Plastic
Model	QY12
Part Number	QY12

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