High Quality: Spin mop head replacement made by anti-abrasive microfibers, durable and this O Ceda mop replace head won't scratch the surfaces you're cleaning. Also the microfiber mop head removes and absorbs tough dirt and grime effortlessly. Specification: This O-Ceda mop refill has the inner triangular rim size 3.9'' and the outer triangular rim size 5.7'' in diameter. This o cedar mop replacement will fit most standard EasyWring spin mop that has a triangluar shape. Universal: The mop replacement head fit for wet and dry use, the spin mop head refill is multi-use so you can use it on tile and wood floors as well as window and car. Easy Installation: Follow the instruction to quickly and easily replace your mop head. It's very sturdy after installation.