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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Heavy Duty Gas Cylinder Replacement for Herman Miller Classic Aeron Chair, Class 4 TUV

Heavy Duty Gas Cylinder Replacement for Herman Miller Classic Aeron Chair, Class 4 TUV

Product ID: 143354091

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Details

Brand
MingYi.office
Color
Black
Material
Metal
Product Dimensions
25"D x 25"W x
Size
2D x 2W x

💪350 lbs load capacity

📏4-inch smooth travel

🛠️Class 4 TUV certified durability

Description

🚀 Elevate your Aeron experience with power and precision!

UNMATCHED STRENGTH 💪 - Supports up to 350 lbs with ease, built for heavy-duty use.
PRECISION HEIGHT CONTROL 📏 - Smooth 4-inch travel ensures perfect ergonomic adjustment every time.
5 YEAR REPLACEMENT WARRANTY 🔒 - Confidence backed by a half-decade warranty—upgrade without worry.
CERTIFIED QUALITY ASSURANCE 🛠️ - Class 4 TUV certified, exceeding ANSI/BIFMA5.1-2011 standards for reliability.
UNIVERSAL FIT FOR AERON SIZES A B C 🔄 - Seamlessly compatible with all Classic Aeron chairs from 1996-2012.

This Heavy Duty Gas Cylinder Replacement is engineered specifically for Herman Miller Classic Aeron chairs (1996-2012), offering a robust 350-pound load capacity and smooth 4-inch height adjustment. Certified to Class 4 TUV standards and exceeding ANSI/BIFMA5.1-2011, it guarantees durability and performance. Compatible with all Aeron sizes A, B, and C, it comes with a 5-year replacement warranty, ensuring long-term reliability and ergonomic comfort.

Specifications

Seat Height	16 Inches
Item Weight	1.15 Kilograms
Unit Count	1 Count
Item Dimensions D x W x H	2"D x 2"W x 11.8"H
Size	2D x 2W x 11.8H in
Item Shape	Cylindrical
Furniture Finish	革
Pattern	Solid
Finish Types	Lacquered
Color	Black
Style	Classic
Product Care Instructions	Wipe Clean
Fill Material	Foam
Seat Material	Foam
Frame Material	Metal
Material Type	Metal
Maximum Weight Recommendation	350 Pounds
Is Customizable?	No
Is Electric	No
Furniture Base Movement	Glide
Tilting	No
Special Features	转

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€ 78.53

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