With the professional workforce of our organization, we manufacture, export and supply a huge array of Breather Spring For Insulation in Mumbai, Maharashtra, India. EXPANSION SPRINGS / CHIL-SPRING are simply attached to strapping with stainless steel wing seals. The strapping is slipped through the seal and then through the spaced opening at either end of the EXPANSION SPRING / CHIL-SPRING. The strapping is then bent back and the wings of the seal are flattened. Strapping is then extended completely around the insulated object, or to the next spring, and the same routine is repeated until the entire circumference has been encircled. Maximum expansion of the 4" spring should not exceed 2-1/2" beyond its original length; it is recommended that each spring be stretched 1/2" upon installation. This allows an additional 2" expansion.