About this item 100% brand new quality. Size: outer diameter 1IN, inner diameter 0.3IN, height 0.8IN. The rotary mop replacement gear can be 100% suitable for O-Cedar and Vilida, and 90% suitable for other brands of rotary mops in the market. Please double check that the size and product shape match before buying. If you don’t know how to install, please contact our store and we can provide you with installation instructions.