Plain back tandem roller assembly with two 1-1/8 inch concave steel ball bearing rollers. The stamped steel housing is adjustable. Used by MIlgard as well as other manufacturers primarily on vinyl patio doors. The housing is 3/4 inches wide and 1 inch tall with a 1/4-20 threaded mounting hole on the back end and an optional use 10-32 threaded hole on the top.
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.