The Perlick 4220-4 Beverage Trunk Housing is designed for remote beer systems, featuring four 3/8" I.D. Bev-Seal Barrier product lines that meet NSF standards. Each product line is 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. The durable black PVC outer wrap is flame-retardant, ensuring safety and longevity. With a 3" diameter, this custom-fabricated trunk housing is sold by the foot, allowing you to specify the exact length needed for your installation.