Ideal for gas sampling, or for pumping gas through apparatus This heavy-wall bulb has two rubber valves with PVC connections * Ideal for gas sampling or for pumping gas through apparatus * Two rubber valves with PVC connections (tubing not supplied) SPECIFICATIONS: * Color: Black * Hole Diameter: 0.29 in (7.4 mm) * Length: 4.2 in (10.6 cm) * Material: Natural Rubber * Outer Diameter: 2.1 in (52 mm) * Quantity: 1 Each * Volume: 85 mL