Kohler GP77006-RP Stem. The stem comes complete with the cap.

The Kohler GP77006-RP Stem is a genuine Kohler replacement part designed for Coralais two-handle faucets. Here are the details:

• Function: The GP77006-RP stem serves as the hot water control valve in your faucet.
• Material: It is made of durable ceramic, ensuring long-lasting performance.
• Direction: The stem is designed to turn clockwise to close.
• Compatibility: Specifically, it is compatible with Coralais two-handle faucets.
• Dimensions: The stem measures approximately 2.25 inches in length, 1 inch in width, and 0.75 inches in height.
• Purpose: When you turn the faucet handle to hot, this stem regulates the flow of hot water.