The McAlpine BSW3PC Centre Pin Sink Waste is a plumbing component designed for use in sink installations. It features an 85mm stainless steel flange and a plug, which help to prevent water from flowing out of the sink and down the drain. The "centre pin" in the name refers to the mechanism that holds the plug in place. When the plug is inserted into the drain, the centre pin engages with a corresponding slot in the plug, creating a watertight seal. To remove the plug, you simply need to pull up on it, disengaging the centre pin and allowing water to flow down the drain. The stainless steel flange provides a durable and corrosion-resistant mounting point for the waste assembly. It is designed to fit standard sink drain openings, and can be secured in place with the included fixing screws. Overall, the McAlpine BSW3PC Centre Pin Sink Waste is a reliable and effective component for use in sink installations, and its stainless steel construction ensures a long service life. ・ Available in 1¼", 1½" and 2" sizes ・ 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