Braided Stainless Steel Oil Cooler Lines. Can be used for Engine Oil Cooler or Transmission Oil Cooler. These oil lines are available in one size only 3.4ft (40 inches). They have -10AN Crimped fittings, one end is a straight fitting and the other is a 90 degree fitting, the fittings are crimped to eliminate possibilities of oil leaks, once again they are -10AN fittings. These Oil Lines are made for any Oil they will not deform or crack they are made to run Oil. Additionally these hoses are wrapped with Braided Stainless Steel which protects them from heat and protect the hoses against rubbing and wearing out. The hose diameter is 0.8 inches or 21mm.