Our 5L high efficiency shaker flasks are ideal for medium size scale up work The geometry of the flasks also allows for higher shaker speeds without damaging the cells Faster shaker speeds means better gas exchange higher growth rates and more yield per flask This product features pre-assembled tubing connectors and gas exchange filters allowing for the movement of liquid in and out of the Erlenmeyer flask with minimal risk of contamination Many customers have realized significant cost savings by switching to aseptic transfer systems 5L High Efficiency Erlenmeyer Flask 1 system per double wrapped sterile bag - 4 systems per case Flask made of USP grade VI virgin polycarbonate Untreated super smooth interior surface ideal for suspended cultures Attached bi-directional transfer cap TPE Thermolastics pipes Pipe Diameter 1/8in ID 1/4in ID Pipe Length 30cm 30cm Recommended volume 30-40% of the bottle volume Rotation speed suggestion the starting speed is 75-125RPM you can control