Unicel FS-3037 Replacement Filter Grid for Sta-rite System 3 Model S7D75 SD Series De Filter Set Diameter: not available; length: not available Top end cap: not available, 0-inch inner diameter; bottom end cap: not available, 0-inch inner diameter Pleat count: not available; filter media: not available; filter area: 37 square feet Get more efficient filtration and better water clarity with Unicel filters Longer time between cleanings; meets oem specifications