Air, oil, and fuel filters, PNEUMUFFLER units, and air dryers are the stock-in-trade of M M Hydro Pneumatics Pvt Ltd, which supplies them to Indian Railways, the Indian Navy, and private industry. Pneumatic filtration and pipeline projects are its particular strengths. Founded in 1997 and based in Mumbai, the ISO 9001:2015- and ISO 14001:2015-certified company serves railway and industrial customers through a pan-India presence and OEM partnerships.