17x120 mm PS Dome Top 1,800 Particulate analysis, optical measurement 50 mL 30x115 mm PP Flat-top 16,000 High speed spins, freezing, storage 175 mL 61x118 mm PP Plug-seal 7,500 Maxiprep, sample washing and concentration 225 mL 61x137 mm PP Plug-seal 7,500 Maxiprep, sample washing and concentration PP = Polypropylene, PS = Polystyrene