· Convenient and economical option for suspension cell culture · Bio-reaction tubes provide an environment perfect for small scale suspension culture or biological reaction experiments that require aseptic conditions with gas exchange · 15ml conical bottom tube · Sterile (gamma irradiated) · Easy-to-read black graduations and a large white marking area · Caps have an ultrasonically welded 0.22µm hydrophobic membrane to allow gas exchange · Packaged in foam rack of 50 tubes