These units consist of a double-sealed single row deep groove bearing, and cast iron(or other material) housing in various configurations. Models: UC, UCP, UCF, UCFL, UCT, UCFC, UCPH, UCPA UCHA, UCFB, UCFA, UCC, UCPP, UCPF, UCPFL UK, UKP, UKF, UKFL, UKT, UKFC, UKPH, UKPA UKHA, UKFB, UKFA, UKC, UKPP, UKPF, UKPFL NA, NAP, NAF, NAFL, NAT, NAFC, NAPH, NAPA NAHA, NAFB, NAFA, NAC, NAPP, NAPF, NAPFL SA, SAP, SAF, SAFL, SAT, SAFC, SAPH, SAPA SAC, SALP, SALF, SAFD, SAPP, SAPF, SAPFL SB, SBP, SBF, SBFL, SBT, SBFC, SBPH, SBPA, SBC, SBLP, SBLF, SBFD, SBPP, SBPF, SBPFL