Used on viking heavy duty pump model hl-124 for the afff system aboard 210 ft wmec and 378 ft whec class coast guard vessels. 25.00mm bore diameter unit consists of: 1ea locknut p/N2-507-003-375; 1ea lockwasher p/n 2-807-003-375; 1ea end cap p/n 2-140-001-781; 2ea bearing spacer collar p/n 2-288-003-210; 2ea lip seal p/n 2-283-007-378; 1ea ball bearing p/n 2-055-012-375; 1ea bearing housing p/n 3-060-034-922 cylindrical cartridge