Birzman Head Pump Push & Twist

Compatible with both Presta and Schrader under the same steps.
No damage to the valve core.
No blow-offs under high pressure.
Pressure bleed button (CAD) for ultimate accuracy.

If the engagement is not secure enough, simple twist the collar by a further turn.
Please ensure the valve is parallel with the valve head whwn inserted.
If the collar cannot be pushed down properly please pull it back and twist it counterclockwise before further attempts.