PRB12-4 filter

Dimensions
Diameter: 73 mm
Length: 495 mm
Top hole : 27 mm (1 1/16")
Bottom hole : 27 mm (1 1/16")

Used in spas made by
Rainbow, Pentair Pool Products, Jacuzzi Whirlpool Bath, Lifeguard CL 29

Part numbers
Pleatco : PRB12-4
Unicel : C-2612
Filbur : FC-2340
Rainbow : R173326