The McAlpine PUS70-CP 1.5" Pop-Up Sink Waste is a plumbing fitting used to drain water from a sink. It features a 70mm stainless steel flange, a chrome-plated plastic command knob, and a center pin model. The pop-up waste mechanism allows the user to easily control the flow of water from the sink. The chrome-plated plastic command knob is used to open and close the pop-up waste mechanism. The center pin model is designed to ensure a secure and leak-free connection between the sink and the plumbing system. The McAlpine PUS70-CP is made from high-quality materials, which are durable and resistant to corrosion.