We are offering Double Compression (flameproof Cable Galnds - 2c). Material: brass (is-319) standard plating: nickle plated standard (tin/cadmium/chrome also available) entry threads: et"/bsc-standards (in pg/metric/npt/bsp also available) sealing rubber ring: nitrile / neoprene gland standard: bs 6121 protection class: ip 66 as per is 13947 application: generally used in hydrogen gas area (gas 2c).