The Perlick 4303-24 Beverage Trunk Housing is designed for remote beer systems, featuring 24 durable 5/16" I.D. Bev-Seal Barrier beer lines that meet NSF standards. Each product line is both color-coded and number-coded for easy identification. The housing includes robust 1/2" O.D. copper coolant lines and is insulated with 3/4" thick thermal material to maintain optimal temperature. Its black PVC outer wrap is flame-retardant, ensuring safety and durability. With a 5-1/2" diameter, this trunk housing is an efficient solution for your beverage dispensing needs.