Perfect Size Range: KDP Heater hose connector kits contains four heater hoses connector shapes: straight, elbow, "T" and reducer. Which will make sure you wont be caught without the right size to make a repair.Material Advantage:The heater hose connector is made of high quality PA66 G35 Nylon. It makes our heater hose connector harder more durable and higher temperature resistant comparing with normal nylon PP or PE barbed fittings. And PA66 Nylon fitting is much lighter than the brass fitting and steels connectors.High Temperature Resistance: -40 Deg. F to +257 Deg. F (-40 Deg. C to +125 Deg. C) Maximum Pressure: 150 pounds_per_square_inch Perfect Design:The KDP heater hose and fuel line connectors use a unique single barb design to provide greater sealability between single or dual inside diameter hoses. Available in straight, 90° elbow and tee shapes - almost any hose configuration can be constructed.Applications: The heater hose connectors are universal and widely used for connectors of the vacuum line and rubber heater hose in engine bay,also can use as the connector of coolant hoseEconomical: Compared to other types of fitting, KDP heater hose connector is considered more economical with high value system component options.