4 x o-rings to fit the following Suunto dive computers :
Mosquito
D3
YOU CAN THEN BUY YOUR BATTERIES LOCALLY CHEAPER.
The high Scuba grade specs are:
Manufactured from Nitrile 70° Shore HardnessManufactured to the
following international standards: ASTM D2000 DIN3770 M2BG714 A14 B14
EA14 EO14 EO34 EF11 EF21 F17RoHS Directive 2002/95/EC
compliantColour: BlackOperating temperature range: -30°C to
+120°CNitrile N70 is also known as Buna-N Suitable for static &
dynamic applications.
Great as a spare.
THESE ARE MADE ESPECIALLY FOR THIS APPLICATION NOT OFF THE SHELF SOMEWHERE NEAR WATCH SEALS.