Seward Clear-spin 10K and 12K microcentrifuges provide safety and convenience when working with biohazardous samples. Low-cost, easily replaceable rotors and disposable tube carriers feature certified hermetic sealing in a clear, chemical- and biohazard-resistant plastic to ensure 100% protection before, during and after processing. The carrier also functions as a storage rack to minimize handling and pellet disturbance. Integrated strobe light allows you to view samples during centrifugation. With automatic recognition of up to 1,000 rotors, the unit indicates when it is time to replace a rotor. Available with 18- and 24-place carriers for standard tubes from 0.25 ml to 1.5 ml, rcf up to 14,500 × g.