Topeak Joe Blow Mountain II Floor Pump. Features: A unique mountain bike specific floor pump that features a super-sized barrel that inflates tires/tubes nearly 50% faster than normal floor pumps Delivers the higher volume required for large off-road tires providing 722 cc per pump stroke Features TwinHead pump head and 3.5" easy to read gauge Includes ball and bladder needles Specs: Barrel Material:steel Gauge:60psi Color:green/black