Only 61g/2.2oz...about half the weight of the steel equivalent bolt. Direct replacement for Italkart, Intrepid, OK1, Praga or any kart that uses this style 10mm hardware. This is the latest bumper bolt with the nut at center so the bolt could be tightened independently of the bumper mount. 170mm overall length, 75mm length on the clipable end, 80mm on non-clipped end, 10x1.5mm thread.