Isolated copper tube Bi-polar approved and certificate 1/4 “x3/8”. Roll 10m. 2 1/4 “nuts. 2 3/8” nuts. Isolated uni-polar copper tube 1/4 “x3/8” certificate. With twisting nuts. Roll 10m. Application: refrigeration and freezing and freezing. Conservation maintenance in hospteler machinery ≠ A, bottle racks refrigerated, conservative and domestic, refri