JinShi co., LTD.,specialized Wright in the production and sale of all metal self-locking round nut, round Nylon self-locking nuts, nut bearing circle, including Secretary China. * Materials : SAE1008 low carbon steel MATERIAL Carbon Steel SS41 C1045 (SAE1008) LOWCARBON STEEL SUS304 stainless steel SUS304 (A2) * Scope of application : machinery, motor axis, reducer, vibrator, oil, etc.If any question or Need other specifications, please E-mail or TradeManager to me or Message in orderThis shop support MixedLot,Need other products,Please contact me.We determined the price, quantity, freight cost.I will new orders foryou.This can save freight cost for you.