The McAlpine 1 1/4" 95 Degree Multifit Bend X BSP Coupling Nut S5M-A is a plumbing fitting made by McAlpine used to connect pipes in waste and drainage systems. The "1 1/4"" measurement refers to the diameter of the pipe the fitting connects to. The "95 Degree" angle creates a sharp turn in the piping. The "Multifit" designation indicates versatility with various pipe materials, including copper, lead, and PVC. The "BSP Coupling Nut" is the threaded connection for secure attachment to other plumbing components. The "S5M-A" is the model number for this specific variant. Overall, the McAlpine 1 1/4" 95 Degree Multifit Bend X BSP Coupling Nut S5M-A is useful in waste and drainage systems requiring a sharp turn and compatibility with multiple pipe materials.