This shower enclosure has quick-release bottom rollers, which are easy to remove and clean. It has 16 metal wheel systems for smooth sliding and has a chrome-plated stainless steel bar handle. The corrosion-resistant polished aluminium frame creates a steady and safe structure. It passed the multi-waterproof test and is definitely waterproof guaranteed. All our rollers and moving parts are fully endurance-tested. All screws are made of stainless steel, rust-resistant and long-lasting.