It's always a good idea to replace these parts anytime a base is removed. Schematic is included with each kit
Gas Cylinder Replacement Bearing Kit Part # 108 Price $19.95 includes shipping to anywhere in the continental US Qty :
Instructions
	Rubber Cushion	Bearing Grease Originally developed by Dr. Harley Rand in the early 1960's to reduce friction and wear on metal-to-metal parts. It also reduces sound, vibration, is water resistant, and a rust and corrosion preventative! Item# 1241 2oz. Container  Price $11.80 each Qty :
	Bearing Assembly
	13/16" Washer
	15/16" Washer
	Thin Washer
	Base Retainer Clip

Herman Miller® Replacement Aeron Gas Cylinder
Our Aeron single stage replacement gas cylinders are made to the same specifications as the originals and are in stock for quick ship. Our cylinders will work to replace both the single and dual stage cylinders.
Stage I $ 98.95 ea Qty :	Stage II $ 168.00 ea Qty :
Look at the sticker under the seat of your chair. Your sticker should let you know which one fits your chair. AE1(2)3 or AE1(1)3 the second number is the key, if it's a 2, then you need a 2 stage cylinder. If it's a 1 than you need a one stage cylinder.