Hot Spring Spas C65 Replacement Filter Cartridge.

Has a flat top and bottom with a open hole at each end.

Filter dimensions:

Height:  268mm(end to end)

Width: 215mm

Hole:  ID- 75mm

Compatible with: Bengal, Blue Lagoon, Bolt, Caspian, Fiji, Flair, Glow, Manora, Pulse, Relay, Rhythm, Sovereign (89-90), Sumatran, Tempo