Linear Bearing for CNC parts,3d printer parts Item No. LMF10UU Packing element : 2 personal computer Material: Housing : Gcr15 steel, harden Ball:Chromium steel Gcr15, warmth treatment, not easy chrome plated Cage:Engineering plastics About shippingmkent 1.We promise to ship out within forty eight hours after the fee is confirmed 2.We use China Post as default shipping method, it takes about 15-38 operating days to most countries. 3.ePacket is instant to USA . it takes about 7-14 days.also we support DHL.EMS.Fedex for options.About payment ONLY make fee by way of sorts of payment methods in A bout Warranty please test the package to see if the parcels are damaged or not before signed. if have some problems ,please dont worry, inform us inside 7 days with clean pictures or video,we would offerreplacement,a discount or full refund, consistent with the Problem.do our best to resolve the problems! HOPING WE CAN MAKE A LONG AND STABLE COOPERATION!