YuanQian Set of 4Twin Shower DoorRollers (2pcs top and 2pcs bottom). YuanQian Set of 4 Twin Shower DoorRollers 23MM (2pcs top and 2pcs bottom). Pulley: 23MM, GlassThickness: 4-6mm. Glass Open-Hole: ¦8-13MM can be fit ; Pulley: 23MM GlassThickness: 4-6mm.
