Perfect Compatibility - The mop pad refills are perfectly compatible with Eufy C20 Omni robot vacuum. Please make sure your model is correct before order. Please be noted that: This is not an OEM product. Any use of the brand name or model name is intended solely to demonstrate compatibility of this product. Great Value Package - 4 pieces C20 Omni mop pads included in the package. It is a cost-effective choice to supplement the pad refills spare pack for you. It suggested to replace the mop cloth when the pad surface becomes visibly dirty or the dirt chamber is full. Premium Materials - Our C20 Omni mop pad refill is made of premium microfibers which have strong decontamination to pick up ultra-fine dust & debris, and break up sticky messes, grime, and kitchen grease. It also can be used on tile, hardwood, and stone, it will not scratch the floor and deliver an incredible clean on carpets and hard floors. Let you use it with ease. Excellent Performance - Durable Mop Pad Replacement