This NIBCO® PressACR Copper Cap is engineered for quick, reliable, and flame-free sealing of copper tubing. Featuring a durable inboard bead and a high-performance gray HNBR O-ring, this cap ensures a tight, leak-proof seal in seconds with a simple press connection—eliminating the need for solder, flux, or open flames. Designed to fit securely over the end of a copper pipe, it provides a clean, robust, and permanent closure for refrigeration and HVAC systems. NIBCO® press fittings are the fastest and easiest solution for joining copper tubing, ensuring efficiency, precision, and long-lasting performance in every installation.