Hudson bearings lpbt-1cs 1 carbon steel main ball 2 hole flange carbon steel housing one inch carbon steel main ball rotates on a bed of eighty 1/8 inch support balls. Support cup is hardened and plated. The cover is also hardened and plated to resist rust. Hudson bearings is an innovative domestic manufacturer of ball transfers. the low-profile ball transfer is designed to be recessed into a 1-3/4 hole. support cup is hardened and plated. housing and ball options include stainless, nylon, phenolic, and delrin.