Place each hexagonal key in each hole of the original pump.
Turn each key in the opposite direction to unscrew the male and female parts of the pump.
Remove the original pump so that you can fit the rubber strap using the pumps supplied with it.
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Incredible
Comfort

FKM Vulcanized
Rubber

Lifetime
Guarantee

Swiss
Manufacturer

Incredible
Comfort

Lifetime
Guarantee

FKM Vulcanized
Rubber

Swiss
Manufacturer