The McAlpine 1 1/4" 90 Degree Surefit Bend S4L is a plumbing fitting designed for use in waste and drainage systems. It is made by McAlpine, a leading manufacturer of plumbing products based in the United Kingdom. The "1 1/4"" measurement refers to the diameter of the pipe that the fitting is designed to connect to. The "90 Degree" angle indicates that the fitting creates a sharp turn in the piping, redirecting the flow of water or waste. The "Surefit" designation indicates that this particular fitting is designed to be easily installed and adjusted, with a flexible joint that allows for some movement during installation. The "S4L" model number likely refers to a specific variant or version of the fitting, although without additional context it's hard to say for sure. Overall, the McAlpine 1 1/4" 90 Degree Surefit Bend S4L is a specific plumbing fitting that may be useful in certain waste and drainage systems where a sharp turn is required. ・ Available in 1¼", 1½", and 2" sizes ・ Surefit Waste Fittings only suitable for McAlpine HDPE Waste Pipe