Industry Standard Grade 100 loose ball bearings. Choose from hardened chrome steel or 316 stainless steel. AISI-316 STAINLESS THROUGH HARDENED 26-40RC (NOT MAGNETIC). AISI-52100 STEEL THROUGH HARDENED 60-67RC (MAGNETIC). This item is in the category "Sporting Goods\Cycling\Bike Components & Parts\Bearings". The seller is "karens1023" and is located in this country: GB. This item can be shipped worldwide.