Does this make the chair taller?

Yes, it makes the chair Taller. The original Herman Miller cylinder sit about 2 inches past the wheel base. The heavy duty cylinder sold here sits taller as it doesn’t go past the base. Hope this helps!

does this come with the bearing already installed

Yes, the bearing installed already, Inside outer tube, thank you!

How can you tell how old the chair is (if it is between 1996 and 2012)?

Check the serial number and or Part numbers on the chair. Call the manufacturer my chair was a Herman Miller chair and they were able to tell me when it was sold to me and that I had a 10-year warranty... S0 the numbers on the chair sometimes indicate MFG year. Good Luck

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🪑 Elevate your workspace with precision power and lasting comfort!

BUILT TO ENDURE - Class 4 heavy-duty pneumatic cylinder engineered to support up to 350 lbs with ease.
CERTIFIED QUALITY - Exceeds ANSI/BIFMA5.1-2011 standards for unmatched reliability and safety.
UNIVERSAL AERON FIT - Compatible with Herman Miller Aeron chairs Size A, B, and C (1996-2012 models).
WORRY FREE WARRANTY - Backed by a 5-year replacement warranty to keep you seated in confidence.
PRECISION HEIGHT CONTROL - Enjoy seamless 4.5-inch seat adjustment for perfect ergonomic posture.

The MingYi.office Class 4 gas cylinder is a heavy-duty pneumatic lift designed specifically for Herman Miller Aeron chairs (1996-2012). It offers a smooth 4.5-inch seat height adjustment, supports up to 350 pounds, and exceeds ANSI/BIFMA5.1-2011 standards. Crafted from durable alloy steel and backed by a 5-year warranty, it ensures reliable, long-lasting performance for your premium office seating.

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Brand	MingYi.office
Model Number	Cylinder-H
Color	White
Product Dimensions	6 x 6 x 30 cm; 1.13 kg
Material	Alloy Steel
Special Features	Heavy, Heavy Duty, Gas, Travel, Height Adjustment, Seat
Item Weight	1.13 Kilograms

MingYi.officeGas Cylinder Heavy Duty for Herman Miller Classic Aeron Chair as Replacement

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