... 3/4" Material: according to the customer's requirements Insulated copper tubes are widely applied in the vehicle, ships, buildings ... engineering, air condition, refrigerator, etc.Standard Complied: ASTM B-280, EN-12735, JISH-3300, GB/T-17791(copper tube) Insulated Material: ... customized tube( Max.length=50m) Insulated tube can be made with black rubber material. Insulated tube can be printed with black ...