Chamberlain Garage Door Opener 8-ft Chain Rail Extension Kit AC4 Laminate Pneumatic Performance: Nitrogen air spring

Pneumatic Performance: Nitrogen air spring mechanism drives 18GA brads 5/8 in

) 528 Product Thickness (in

Transitional Drain Kit Included Drain Kit Included Returnable 180-Day Flow rate (gallons per minute) 1

Professional Precision

approximately 5

Chamberlain Garage Door Opener 8-ft Chain Rail Extension Kit AC4 Laminate Pneumatic Performance: Nitrogen air springFor Chamberlain chain drive models in 8 ft garage door applications Works on garage doors up to 8 ft high Comes ready to install complete with instructions Kit includes rail extension, replacement chain cable, and all necessary hardware and instructions for a quick and easy installation Features Type 8 ft chain rail extension kit Package Contents Kit includes rail extension, replacement chain cable, and all necessary hardware and instructions for a