... agrigultural v belt, conveyor belt, rubber sheet, rubber seal, rubber hose, etc., with different materials, techniques and usages. and our products ... pressure of-80kpa(600mm mercury)at the vacuum.The hose can't become flat under pressure,and can't off from it ... : With optional Metal flange joints or Cam lock couplings with hose clamps .Specification:Inside Diameter: 102mm----457mmLength: Up to 20 ...