GREEN MEANS CRIMPED: SurePress copper press caps feature built-in viewing windows that fill with a green indicator after pressing, confirming a completed connection. Visible from at least 5 feet away for quick verification before pressure testing NO HEAT OR FLAME INSTALLATION: Copper fittings are designed for press installation using compatible tools, no soldering, heat, or open flame required. The streamlined “press, see green, and go” process improves efficiency and reduces labor time on the jobsite DURABLE COPPER CONSTRUCTION: This plumbing fitting is manufactured from durable copper made without lead, and and made for long-term reliability in potable water and plumbing systems COMPATIBILITY & HIGH-PERFORMANCE RATINGS: Type K, L, and M copper tubing compatibility. Supports hard copper sizes from 1/2" to 2" and soft copper from 1/2" to 1-1/4". 300 PSI working pressure, 600 PSI test/burst pressure, temperature range of 0°F–250°F VERSATILE APPLICATION USE: Our plumbing fittings are approved for marine, RV, and mobile home installations. Suitable for hot and cold potable water, rainwater/gray water systems, chilled water, and residential steam applications (up to 5 PSI maximum), Weight: 0.06 Pounds, Manufacturer: QuickFitting