APPLICATION RANGE: Barb Hose Fitting is widely used to connect various pneumatic pipes, quick and simple connections, and is good for hydraulic hose, air, water, liquid, fuel, oil, and gases.DURABLE DESIGN:1. Made of PP plastic material, firm and durable, lightweight and durable, smooth surface and inner wall.2. Easy to install and disassemble: Connect the hoses corresponding to the inner diameter to the joints respectively.NEED ATTENTION:1. Before purchasing, please confirm the right size.2. Manual measurement, please allow a slight dimensional error of the item.