aFe Magnum FORCE Cold Air Intake System Spare Parts Kit (3/4in ID x 24in L)aFe POWER Magnum FORCE 3 4 IN ventilation hose. This item is designed to directly replace hoses provided with aFe POWER products. This hose is commonly used for crankcase ventilation, in addition to a variety of other applications requiring a 3 4 IN internal diameter. Withstands Temperatures From 58F to 356F ( 50C to 180C) Silicone Material Resists Splitting & Hardening Nylon Reinforced for Extreme Durability Includes 24 of 3 4" ID Hose