Chamberlain 10 ft. Chain Drive Rail Extension Kit

Item # 303989073 | Chamberlain Part # 7710CB-P | UPC Code 012381187065 | UNSPSC Code 30172109
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Product Overview

The Chain Drive Rail Extension Kit for 10'-High Garage Doors is required for reliable, everyday operation of Chamberlain chain drive models in 10-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) 49.97 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
  • The Chamberlain 10 ft. Chain-Drive Extension Kit is compatible with all Chamberlain chain drive garage door openers (except heavy duty chain drive 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


1-year warranty