Material: PVCu; Manufactured to BS EN 1329-1 and BS 4514 (PVCu soil pipes & fittings: 110mm). - 4 x Ø60mm boss shoulders/sockets: All boss shoulders provided are a common size and will accept Ø32mm, 40mm and 50mm waste pipes using a comprehensive range of boss adaptors; where a boss shoulder is moulded solid, it should be drilled through with a Ø60mm hole saw.
eBay