The Polypipe SB417 is 
a 110mm double socket bend for soil and vent systems, designed to create a 92.5-degree turn in drainage pipes. It is made from tough PVC and is part of the Polypipe soil range for residential plumbing applications. The "double socket" means it has a socket at each end for connecting pipes, and it can be installed using either a push-fit or solvent weld method. 
Key features
Angle: Creates a 92.5-degree turn in a soil pipe system.
Diameter: Designed for 110mm (or 4-inch) diameter pipes.
Connection type: "Double socket" with a socket at each end, compatible with push-fit and solvent weld connections.
Material: Manufactured from durable PVCu.
Certification: Certified to standards like BS4514 and EN1329.
Color: Available in various colors, such as grey (SB417G), black (SB417B), and white (SB417W).