This clamping band knob is designed to use with Pentair SM & SMBW 2000 and 4000-series pool/spa D.E. filters and also compatible with Pentair Nautilus Plus pool and spa D.E. filters.

• Clamping band knob replacement
• Fits Pentair SM & SMBW 2000 and 4000-series D.E. pool/spa filters
• Also fits Pentair Nautilus Plus D.E. pool and spa filters
• Measures 3-inch length by 1-1/2-inch height by 1-1/2-inch width