Push / Pull Type Quick Release Couplings are without single and double check valve. Push / Pull Type Quick Release Couplings are manufactured by RM Applied Engineers which is an ISO 9001 certified company. The Company also manufactures all range of hoses and expansion joints. The Push / Pull Type Quick Release Couplings have size ranging from 1/4" to 2" NB. These Quick Release Couplings are made of cast iron, stainless steel, brass and aluminium with seals made of nitrile, viton, neoprene, hyplon etc.