PerkinElmer translucent polypropylene tubes are designed to provide excellent chemical resistance. PerformR™ 15 mL and 50 mL conical tubes are designed for your routine everyday applications and storage needs. SuperClear™ tubes are made from a unique medical grade resin. PerformR and SuperClear tubes are available with either a at cap with a two stage seal, or a plug style cap that includes a very deep sealing area.