Prime-Line Matte Silver Nylon Bi-Fold Door Guide Rod 2 pc

This is a top mount bi-fold door guide wheel/cap on a spring-loaded steel shaft in a 3/8 in. nylon housing. The guide cap/wheel is 3/8 in. in diameter with a 5/8 in. lip and is used to fit into a 5/8 in. bi-fold door track.