Chamberlain 10 Ft. Garage Door Chain Drive Rail Extension Kit E-325s A lightweight underlayment designed for

A lightweight underlayment designed for tile installations over wood and concrete substrates

Hood and throat designed to maximize airflow

and covered patios

flat surface

Chamberlain 10 Ft. Garage Door Chain Drive Rail Extension Kit E-325s A lightweight underlayment designed forThe Chain Drive Rail Extension Kit is required for reliable, everyday operation of Chamberlain chain drive models. 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.