The Perlick 4220-16 Beverage Trunk Housing is designed for remote beer systems, featuring (16) 3/8" I.D. Bev-Seal Barrier product lines that are both NSF-certified and color-coded for easy identification. Each line is number-coded for added convenience. The housing includes 1/2" O.D. copper coolant lines and is insulated with 3/4" thick thermal material to maintain optimal beverage temperature. With an overall diameter of 4-3/4", this trunk housing is custom fabricated at the factory and sold by the foot, allowing you to specify the exact length needed for your setup.