GJP 1 1/4" Stainless Steel Pillow Block Bearings Housing SSUCP207-20 Equal with MUCP207-20 And SUCSP207-20. Which is designed with stainless steel housing and stainless steel bearing insert, the housing is SUS304 steel material, what’s more, there is a solid base heavy duty housing for GJP’s products,for the bearing, it is SUS440 material (Equal with Chinese stainless steel material code 95Cr18 according to GB-3086), bearing with bore of 1 1/4", and triple lip seal on the extended side, narrow inner ring with set screw lock, which is 120 degree space on the IR to lock the shaft(there is a +/-1 degree tolerance to the two 1/4-28 tapped hole positions)