We are specialist manufactures of sleeves for one of the leading hitech manufactures of batteries to Indian Air force, Navy and Army. Our customer could win the title 'Preferred supplier' from the defence authorities because of our timely supply of quality products.The sleeves supplied by us to the defence battery manufacturer have the following application. The sleeves manufactured and supplied by us are assembled with a stainless steel screw. This assembly known as vent plug assembly is used to plug by (tightly screwing in) the cell containing potassium hydroxide solution as electrolyte. During charging the cell a slight amount of gas develops inside the cell. During discharging gas condenses to liquid. Rubber sleeve in the vent plug assembly. Releases the gas if the pressure is more. [In other words it prevents Cell from bursting due to excess internal pressure]. The subject cells made with nickel & cadmium ingredients are assembled as batteries and are being used in air crafts by Indian Air force.