Cat No. Description 844021 20 x 1 x 200 mL Syringe w/60″ Y-Tubing and dual check valve / Case 844023 20 x 2 x 200 mL Syringe w/60″ Y-Tubing and dual check valve / Case 844020 20 x 1 x 200 mL Syringe w/60″ Y-Tubing and no check valve / Case 844022 50 x 2 x 200 mL Syringe w/60″ Y-Tubing and no check valve / Case 844015 50 x 1 x 200 mL Syringe w/60″ Y-Tubing and single check valve / Case 844016 50 x 2 x 200 mL Syringe w/60″ Y-Tubing and single check valve / Case 810551 50 x Transfer Set / Case 844012 50 x 60″Y-Tubing w/dual check valve / Case 844010 50 x 60″Y-Tubing w/no check valve / Case 844011 50 x 60″Y-Tubing w/single check valve / Case