or
Bal Supply Double Valve Bulb, Autoclavable: Autoclavable, Black, Disposable: Yes, For Use With: Gas Apparatus, Rubber, Model: DVMVT, Non-sterile, DV Bulb, Volume: 85 mL, Height: 2 in., 50 mm, Includes: 4 in. Rubber Tubing, Length: 6 in., 150 mm, Weight: 2