Lifetime 60055 Glider Bench, 4 Feet, Faux Wood Superior Strength and Durability; constructed of UV-Protected Polystyrene that will not warp, crack, chip, or peel Easy to assemble The beauty of wood without the maintenance Ball bearings provide smooth and quiet glide Slats allow for quick water drainage Powder coated steel frame Synthetic all-weather wood slats Smooth gliding motion Assembly required.