Chamberlain Chain Drive Rail Extension Kit for 8 ft. Garage Doors

Item # 3585206 | Chamberlain Part # 6608CD | UPC Code 012381186938 | UNSPSC Code 30172109
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Product Overview

The Heavy Duty Chain Extension Kit for 8 ft. High Garage Doors is required for reliable, everyday operation of Chamberlain heavy duty chain drive models in 8 ft. garage door applications. Featuring a quick-install extension rail and replacement chain, the kit includes everything needed for quick and easy installation. Includes one-year warranty, rail extension, replacement chain, all necessary hardware and an instruction manual for easy setup.

  • Proven quality: rigorous quality testing ensures lasting performance
  • Product dimensions: (D) 37.70 in. x (H) 1.00 in. x (W) 1.25 in.
  • Additional assurance with 1-year warranty
  • Chamberlain is the largest and most dependable garage door opener manufacturer in North America
  • Chamberlain 8 ft. heavy duty chain drive extension kit is compatible with Chamberlain heavy duty chain drive garage door openers (models C205 and C455)

Proposition 65 Information

Prop65 Warning Icon WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information go to or


Manufacturer Warranty
Opener Type
Chain Drive