Inline Filter Clamp Suit 2-1/4" O.D Filter, Mount To Flat Panel With 1/4"-20 Bolts

System 1 D-clamps are machined from 6061-T6 billet aluminium and available to secure 2" or 2-1/4" diameter filters. The D-clamps for the 2" diameter filters have two 1/4-20 holes spaced 2-5/8" apart and the larger clamps for 2-1/4" filters have holes spaced 2-3/4" apart.