#312 620 Series 18=20 Inner DiameterThe #312 620 Series 18=20 Inner Diameter is a high quality, high pressure hose designed for hydraulic, fuel, oil, coolant, and industrial fluid transfer applications. With an inner diameter (ID) of 18" and an outer diameter (OD) of 20", this hose is built for exceptional durability, flexibility, and resistance to extreme temperatures and pressures. Specification Value TYPE Hose Clamp DESIGN High pressure capability, designed for demanding fluid