3 Kinds of degrees: this set of valve extenders has 3 kind of angles, 45 degree, 90 degree and 135 degree, and they are all equipped with rubber seals, to ensure that the inflatable airtight Quality and durable: made of copper, with nickel plating on the surface, very sturdy, not easy to get rust or erosion, thus can provide long servicing life Wide range of usage: these tire stem extension will fit all passenger cars, trucks, motorcycles, trailers, RV and recreational vehicles with standard American tire valves Easy to use: you can screw the adapter into your tire valve and the right angle bend allows easy access for the pump, as some tire valve is inside, not suitable for normal pump Quantity: 2 pieces of 45 degree extenders, 2 pieces of 90 degree extenders and 2 pieces of 135 degree extenders, enough for you to use