The McAlpine PUB-CPB 1½" x 70mm Polished Stainless Steel Flange Pop-Up Bath Waste and Overflow is a plumbing fitting designed to drain water from a bathtub. It features a polished stainless steel flange, a pop-up waste mechanism for easy water flow control, and an overflow with a command knob to prevent water damage. The fitting is made from durable, corrosion-resistant materials, offering a sleek look. Installation is straightforward for qualified plumbers and compatible with various bathtub models. This reliable solution ensures a secure, leak-free connection. Flanges and Overflow/Command knob are available in White or Chrome Plated Plastic, or Chrome Plated Brass. It has a 1½" BSP connection and a 70mm Stainless Steel flange. The center pin dry fixing connection allows for quick, simple, and neat installation, saving on material and labor costs. The flexible overflow tube has an OD of 34mm.