Not original, but suitable alternative and fits well. Compatible with Xiaomi M365, 1S, Essential, Pro, Pro 2, Model 3 electric scooters. Motor bolt's size is M12, rear wheel bolt's cap diameter is 11.7mm, total length (including cap) is 21.7mm, total thread length is 10.6mm. Package contents: 2 x motor bolts with washers, 2 x rear wheel bolts with washers.