Wheel shower door roller replacement. Standard model used in 70% of cabins on the market. The screw is made of INOX 304, just like the cage of the bearing ball bearing. The bearing 696RS is sealed to keep the grease inside and protect the entire assembly. The profile of the wheel is round and allows you to hang your door in the guide. The screw is recessed in the wheel by a small shoulder, preventing it from sticking out and catching the rail when opening or closing.