1 It is important parts in vacuum systems. 2 Well sealing ,nice shape,used in vacuum systems everywhere. 3 OEM, Shenzhen TEC Rubber Co.Ltd. is a major rubber sealing elements manufacturer with combination of R&D,production and sales. Founded in 1995, the company has such major products as O-type Loop, U-type Loop, Y-type Loop, rubber strip, oil seal, rubber tubing and various rubber, appliances, ...