This shower enclosure has quick-release bottom rollers, easy to remove and clean. It has 16 metal wheel system for smooth sliding and has chrome-plated stainless steel bar handle. The corrosion-resistant polished aluminium frame creates a steady and safety 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.