... , railway, aviation. Container, pharmaceutical, foreign trade import and export commodity inspection and processing, and enterprise product testing, packaging barrels packaging, energy metering ... of more useSupply common seals, the specifications are 6 mm x 4 mm, 7 * 4,8 * 4,9 * 4,9 ... 35 yuan a range, but also to OEM, welcome to inquireThe original seals are made by metal LEAD, this materials are not ...