1 Certificate:ISO9001:2008,OHSAS,SGS 2 pvc clear tube 3 soft 4 flexible,durable,non-toxic 4 beautiful outlook 1 pvc clear transparent tube 2 it is used for conveying water, oil,gas under normal working condition in the factories,farm,ship,building and family. 3 it is flexible,durable, non-toxic,without odor, and resistant to high pressure and erosion. 4 by adding colorful symble lines on the ...