Pre-tension Springs with Anti-slip Surface Top Cover are heated treated in automatic temperature controlled furnaces to maintain perfect load. These Pre-tension Springs are adjusted for high pressure and height. Pre-tension Springs with Anti-slip Surface Top Cover are manufactured by Jumac Manufacturing Private Limited. Jumac Manufacturing Private Limited also manufactures various types of jute and textile machineries, spares, and spinning cans. The Pre-tension Springs with Anti-slip Surface Top Cover has plastic moulded brackets on top cover for height adjustment. These Pre-tension Springs are finally calibrated for required silver load and to maintain horizontal position.