Wenzhou hengyue seal co ., ltd, located in wenzhou city, zhejiang province of china,was established in 1996. with our effort of many years, our company is becoming the leader in china mainland, owning 2000 sqm of standard building, more than 30 devices and over 100 staff. hengyue seal has a strong team of experienced designers and production technicians. we have successfully developed 7series and more than 100 types of security seals, which are all strictly made according to the standards of iso/pas17712.