Sliding Window Roller with 3/8" Nylon Wheel for Better-Bilt & Elco Windows

This Sliding Window Roller Assembly has a 7/8 inch (22.2 millimeter) long by 1/4 inch (6.4 millimeter) wide nylon housing with a 3/8 inch (9.5 millimeter) O.D. nylon roller. It is used by Better-Bilt Aluminum, Elco and many other window manufacturers.