raw material
natural rubber/butyl rubber
Rubber content
Not less than 45%
Tensile strength
Not less than 9 Mpa
Elongation
Not less than 450%
Adhesive valve
close/good
Air tightness
No leakage or defective workmanship allowed
Marking
Blue lines not less than 4mm wide
life time
not less than 20,000km
packaging
as your requirment