These must NOT be confused with regular aluminum camlocks. The seamless, hardcoat aluminum are specifically designed for snow blowing hoses (up to 750 psi). Due to the inherent weaknesses of quick acting, camlock arm mechanisms, caution and care must be used in high pressure applications. This series is NOT recommended by New-Line for material handling, concrete, air, or any high pressure applications beyond snow making equipment. Hardcoat aluminum fire adapters are also available (see 'Camlock Section', suffix HA). Expansion rings & gaskets included.