This top spacer is designed to use with Pentair FNS pool and spa D.E. filter models FNS 24, FNS 36, FNS 48, FNS 60 and also compatible with Nautilus pool and spa D.E. filter models NS24, NS36, NS48, NS60, NS72. Available in black color. Measures 7-inch length by 11-inch height by 2-1/2-inch width.