请问什么是plumbing and electrical materials ？

Plumbing and electrical materials refer to the equipment, tools, and supplies that are used for plumbing (pipes, valves, fittings, etc.) and electrical (wires, switches, outlets, etc.) systems in buildings and other structures. To obtain these materials, you can try searching for online suppliers or visiting local hardware stores that specialize in plumbing and electrical supplies. It's important to compare prices and quality before making a purchase to ensure that you get the best value for your money.