Hybrid Material: The hybrid hose are made of rubber&PVC blended, Lighter than rubber hose, stronger than PVC, braided polyester for strength and durability, oil abrasion kink resistant Features: Durable PVC and thermoplastic rubber hose remains flexible in cold weather -40℉ to 180℉, Reinforced with braided polyester for extra strength. Bend restrictor prevents kinking near connections. Brass fittings for strength and durability. All those are prolong the using time 1/2”x 4ft.: Inner Diameter: 3/8 Inch(12.7mm); Hose Length: 4 Feet. Suitable for industrial, contractor, or household use. It is ideal for connecting supply lines, compressors, hose reels. The maximum working pressure is 300PSI Brass Reducer: The kit equips with two 1/2”FNPT to 3/8”MNPT reducers and two 1/2”FNPT to 1/4” MNPT reducers. All adapter reducers are brass and can apply to plumbing connections, compressed air, hydraulic, gas and other applications, hex nut for easy tightening and loosening High Flow: This air compressor hose and fittings are intended for air shop, garage or pneumatic application that require over 60+ SCFM. 99 SCFM Max air flow HOOTSUM 1/2 Inch x 4ft. Hybrid Air Hose with 1/2 in. MNPT Ends and Bend Restrictors and 3PCS 1/2 Inch Air Hose Fittings