The McAlpine BSW2P 60mm Stainless Steel Flange Centre Pin Basin Waste with Black PVC Plug is a plumbing component used to remove wastewater from a basin or sink. Here is some more information about this product: The waste has a 60mm diameter flange, which is made of stainless steel. The flange is the part that sits on top of the basin/sink and secures the waste in place. The centre pin refers to the metal rod in the middle of the waste, which opens and closes the waste by moving up and down. The black PVC plug is the component that seals the waste and prevents water from leaking out of the basin/sink. The plug can be removed to allow water to drain out. This waste is designed for use with basins/sinks that have a 60mm waste outlet. Overall, the McAlpine BSW2P 60mm Stainless Steel Flange Centre Pin Basin Waste with Black PVC Plug is a durable and reliable component that can help ensure the proper functioning of a plumbing system. ・ Available in 1¼" or 1½¿ ・ Black PVC plug ・ Available with or without chain and stay ・ Centre pin dry fixing connection has the advantage of a quick, simple and neat installation affording a saving in material and labour costs ・ The polished stainless steel flange eliminates the problem of chrome plating deterioration