Spring blocks used in Behan Cheen mattresses are made of consistently high quality wire using modern equipment. The wire is subject to thermal and special anticorrosion treatment (hardening) at the manufacturing facility under a strict quality control in accordance with the request of Behan Cheen . To maintain a consistent quality of products the Behan Cheen spring manufacturing organizes a multi-stage income quality control of raw materials and goods. Each batch of wire is to be tested for rip, wrench, stratification and spinning ability. Besides, springs undergo the normalization procedure at the Behan Cheen manufacturing facility (removal of residing tension after twisting) which guarantees consistent quality and a long lifecycle of spring blocks.