Pneumatic 30 PSI Squeeze Bulb Dynamometer Scales Use in dialysis blood collection Oxygen Masks Use in dialysis blood collection oncology respiratory critical care and cardiac * Deep recline and Trendelenberg position can only be attained by attendant * 3 positions with infinitely adjustable back * Standard release handle feature for quick back release Polished stainless steel * Perfect for writing or holding a lap top and easily folds when not in use * When open unit measures 17 W x 15 D x 3 H * 30 psi * The inexpensive way to reliably measure hand and finger strength * With an indicator dial that remains at the maximum reading until reset * Calibrated in psi *