[Compatibility] This disc brake pad is compatible with Kugoo M4 electric scooter. [Material] The disc brake pads are made of stainless steel, which is wear-resistant and can provide long-lasting and stable performance. [Size] The disc brake rotor has an outer diameter of 140mm and an inner diameter of 33mm. [Extended Service Life] Regular replacement of the brake disc can extend the overall service life of the scooter. [Package Included] The package contains 1 6-hole brake disc, 6 screws and 1 pair of brake pads, which is able to update the disc brake system of the electric scooter. Warning: It is illegal to ride electric scooters on public roads, pavements, or cycle paths. They are intended only for use on private land with the owner’s permissio.