●Size The total length is 80mm and the thread length on both sides is 40mm. ●[304 Stainless Steel]:Made of high quality strong 304 stainless steel, with a high strength and durability, and not easy to deform. ●[Application]:Suitable for connecting scratching columns and attachments of different thread sizes. ●[DOUBLE END THREAD]: M6 to M8 double end threaded screws. ●[Package List]: 2 x Double End Threaded Bolts