Blood Single Collection Unit Prefilled CPDA-1. A wide range of Blood Transfusion Products allows for all species to be recipients of blood transfusion medicine. Canines tolerate standard human transfusion products. Feline patients require much smaller 50–150ml bags. Equine patients need 1–4 liter bags to do the job adequately. CPDA-1 is the anticoagulant of choice in human blood banking. After collection, stored blood will have a 35-day shelf life. Bag comes with 16g diamond point non-detachable needle plus double spike ports. Available in two sizes 450ml or 250ml. 72.5cm tubing.