The Perlick 4220-10 Beverage Trunk Housing is designed for remote beer systems, featuring ten 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 trunk housing includes 1/2" O.D. copper coolant lines and is insulated with 3/4" thick thermal insulation to maintain optimal beverage temperature. Its durable black PVC outer wrap is flame-retardant, ensuring safety and longevity. With an overall diameter of 3-3/4", this custom-fabricated trunk housing is sold by the foot, allowing you to specify the exact length needed for your installation.