Kohler - Gold - Bathroom Sink Pop-up Drain Assembly

Lavatory drain

Modern push-button (“click-clack” or “pop-up”) drain with:

• A decorative drain cap (the brushed brass piece at the top)
• Rubber gaskets for sealing to the sink
• The drain body (black plastic)
• A threaded section for securing it to the sink
• The tailpiece that connects to the P-trap underneath

• 1¼-inch bathroom sink drain

This appears to be a drain designed for a sink with an overflow because of the rectangular slot near the top of the drain body.