Hangzhou Singer Building Materials Co.,Ltd is the first company among the fiberglass shingle filed who pass the IS9001:2008 Quality Management System and ISO14001:2004 Environment Management System.As a premise of large scale production ,our company reply on the most international advanced technology and equipment,backed by technology innovation & development,with our own import and export operation rights ,fully integrating global sources,winning a very high cost-effectiveness on the market.Then we really did that ?same quality lowest price,same price best quality.