MTC Bio’s Sure Seal 1.5ml and 2.0ml microcentrifuge tubes are designed for a broad range of research applications, including enzyme digests, DNA isolation/purification, centrifugation, incubation, and general sample/reagent storage. Sure Seal S tubes are manufactured under clean room conditions, using only Bio Clear co-polymer, an advanced polypropylene that maximizes clarity, centrifugal strength (tested up to 28,000×g) and the usable temperature range (-90°C to +121°C).