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

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

Product ID: 241985461

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Details

Brand
MingYi.office
Colour
Black / Black
Product dimensions
5.1D x 5.1W x
Size
2D x 2W x in
Back style
Mesh Back

⏳5-year replacement warranty, long-lasting

💪350 lbs load capacity, ultra-durable

📏4.5" stroke for smooth height adjustment

Description

🚀 Elevate your workspace with precision and power!

BUILT TO ENDURE - Supports up to 350 pounds, exceeding ANSI/BIFMA5.1-2011 standards for unmatched durability.
PEACE OF MIND WARRANTY - Backed by a 5-year replacement warranty—invest in reliability that lasts.
EFFORTLESS INSTALLATION - Simple adjustment screws ensure flawless lift performance post-installation.
UNIVERSAL FIT FOR AERON - Compatible with Herman Miller Aeron chairs Size A, B, and C (1996-2012 models).
PRECISION HEIGHT CONTROL - Experience seamless 4.5-inch seat travel for perfect ergonomic positioning.

The MingYi.officeGas Cylinder is a heavy-duty, Class 4 pneumatic gas lift designed as a direct replacement for Herman Miller Classic Aeron chairs (1996-2012). Featuring a 4.5-inch stroke and a robust 350-pound load capacity, it surpasses ANSI/BIFMA5.1-2011 standards. With easy installation and a 5-year warranty, it guarantees smooth, reliable height adjustment for a superior ergonomic experience.

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