BIG BLUE® FlowTech M 150 Mini-Cartridge Filter Housing Super Clean Design FlowTech RS 150 Single Cartridge Filter Housing Ring Seal Design FlowTech FC150 FlowTech IL 150 In-Line Single Cartridge Filter Housing FlowTech SS150 FlowTech TF 300 High Temperature Housings MC™Series Multi-Cartridge Filter Housings Opaque Pure Polypropylene (12 Opaque (white) 222, w/dbl cap plugs) SC™Single-Cartridge Filter Series SLIM LINE®HOUSINGS Third Generation Slim Line® Housings Third Generation Standard Filter Housings Valve-in-Head Housings VBA Series