... , C&U, W&Z, etc. Bearing Types: deep groove ball bearings, angular contact ball bearings, self-aligning ball bearings ... stamping bearings, miniature bearings, non-standard special bearings, etc. Pulley type: window and door pulleys, shower pulleys, etc. Concave ... States and Southeast Asia.Specification:Name: window roller, window pulley ,wheel2.Material:Nylon and bearing3.Surface treatment: plated zinc ...