The McAlpine Trap Inlet Reducer 1.1/2"X1.1/4" T16 is a plumbing fitting used to reduce the size of a trap inlet from 1.1/2 inches to 1.1/4 inches. The "T16" in the description refers to the specific model of the trap inlet reducer, which is manufactured by McAlpine, a UK-based company that specializes in plumbing and drainage products. The reducer has a 1.1/2 inch end that fits over the trap inlet and a 1.1/4 inch end that connects to the pipe. The trap inlet reducer is designed to create a secure, leak-free connection between the trap inlet and the pipe. Overall, this type of fitting reducer is commonly used in plumbing applications where a trap inlet needs to be reduced in size to connect to a smaller pipe. The McAlpine Trap Inlet Reducer 1.1/2"X1.1/4" T16 is made from high-quality materials and is designed to provide reliable performance over an extended period of time. ・ Available in 2 sizes