Product Features Includes O-Ring, Collar stop, 2 cc silicone oil. Adaptors included. Stable pressure level, each product is pressure controlled individually. Portability. 60 cc barrel capable of producing a vacuum of 609.6-660.4 mm/Hg. Safe and effective. Appropriate for many different clinical settings. High patient and provider satisfaction. Outpatient procedure. Products of conception (POC) easily visible. Karman Cannula Injector Double Valve Set includes sterile Karman Cannula sizes 6, 7, 8, 9, 10 and 12.