We offer a platelet agitator that is carefully built to allow for easy mounting, dismounting, and smooth sliding while also increasing oxygen gas permeability. The interior of the unit is built of a strong stainless steel that is good for sliding and includes 5 to 9 shelf platforms with more room for agitation. Depending on the unit, it delivers a 60 strokes per minute stroke rate and a storage capacity of 30 to 100 apheresis bags. The shelf platform's shape encourages gas permeability, and a particular motor assembly enables it to make smooth strokes that reduce noise and squeaks.