... Size:Custom 4,Non-toxic tasteless,anti-ozone, oil resistantanc rubber oil hose MaterialEPDM, NBR, NR, Silicone, etc ... busAdvantageStop air, water and dust enter the machine system, protect the machine or parts to be healthy and working wellBear ... tasteless, insulation, anti-ozone, bear burning , oil resistantanceResistant to oil,water,ozone,dustCustomers designs and specifications are acceptedRapid ...