Enduro ACB 3645 SS- 1-1/8" stainless steel, Angular Contact Headset Bearing

ACB 3645 SS - 1-1/8" 440C stainless steel Angular Contact Headset bearing (30.2mm x 41mm x 6.5mm: 36 x 45 deg) - 1-1/8" Angular Contact Internal Headset Bearing featuring 440C stainless steel balls and races to provide superior corrosion resistance. This size bearing is also known in the bike Industry by these part numbers:27287-1046-004HSS0130KTH-873EMR-122 Not all stainless steel is created equal.Enduro only uses 440C stainless steel balls and races to provide long life and superior corrosion resistance in applications and environments that may be less than ideal. 440C has the highest strength, hardness, and wear resistance of all the standard 440-series stainless alloys with high carbon content. As expected, it is also the most expensive of the 440 series alloys and requires multiple rounds of heat treatment and cryogenic treatments to achieve its superior mechanical properties. Though stainless steel has 20% less load capacity and is slightly softer than our standard 52100 chromi