The Perlick 4220-2 Beverage Trunk Housing is designed for remote beer systems, featuring two 3/8" I.D. Bev-Seal Barrier product lines that meet NSF standards. These lines are both color-coded and number-coded for easy identification. The housing includes 1/2" O.D. copper coolant lines and is insulated with 3/4" thick thermal insulation to maintain optimal beverage temperature. Wrapped in a black PVC flame-retardant outer layer, the trunk housing has a 3" diameter and is custom fabricated at the factory. Sold by the foot, you can specify the exact length needed for your installation.