NITRILE (NBR) O'RINGS
Buy all nitrile O-rings for diving. The nitrile or NBR O-ring is very frequently used for scuba diving.
The nitrile O-ring is defined by its internal diameter measured in mm and the diameter of its torus in mm.
The hardness of a scuba diving nitrile O-ring is defined as Shore A hardness.
The most frequently used O-rings in diving are the O-ring R19 for the bottle necks or the O-rings R9 and the O-rings R10 for the valves.
Nitrile is used exclusively for AIR use