This listing is for a Pack of 2 Being a "fitting reducer" this cannot be used directly onto 28mm pipe but must be inserted into a 28mm pipe fitting such as a coupling or an elbow. 15mm pipe is inserted directly into the other end of the reducer without the need for a 15mm fitting. Should you require a fitting where the two different size pipes are inserted into the reducer, you should purchase the appropriate sized "reducing coupling" 28mm to 15mm reducer 28 to 15mm reducer 28mm male to 15mm female reducer, Weight: 0.1763698096 pounds, Manufacturer: Primaflow