The D-SW is manufactured from double laminated PVC and has an optical glass port. It is rated for dives of up to 10 metres depth. Perfect for snorkelling, shallow diving, sandy, dusty, humidity or foul weather conditions. This housing will give your camera the best possible protection whilst being fully operable. It has a pair of non-corrosive and seawater resistant clamping rails which fit together for perfect sealing. They tighten by means of two screw knobs. Housing dimensions: length 155 mm ( 6 1/8 inches ) width 35 mm / 65mm with Tubus ( 1 1/3 , 2 1/2 inches ) height 80 mm ( 3 1/8 inches ) front port diameter 42mm ( 1 5/8 inches ) weight 105 g ( 0.22 lb ).