McAlpine 228532 blanking plug to use in traps and fittings in 40mm size. Constructed from LDPE. Provides a secure and durable solution for sealing openings in plumbing systems. Blanking plug can be used for finishing or blanking off an unnecessary hole, providing an option for preventing ingress. It can be fitted without the need of a fastener or fixing, holding themselves in position. Suitable for sealing openings in traps and various plumbing fittings.