The pack of 4 Ezy Storage Bunker castor wheels will make moving your full or heavy tubs easier. Their 360 swivel motion eliminates the need to lift or drag and wheels are rubber-coated to increase grip and protect floors. Made with a metal pivot for added strength these wheels can take loads up to 80Kg. The castors are compatible with any Bunker and Solutions Tubs that are over 20 litres. You simply click them on to the bottom of the container, replacing any existing roller wheel.