The Model 642B offers single-speed processing, simple controls, and an adjustable mechanical timer to meet a variety of blood specimen preparation needs. Set to run at a constant 1,600 xg, users can easily adjust cycle time from 1 to 30 minutes. Horizontal rotor, universal tube holders, and 2-year warranty are included. Max speed 1,600 xg/3,400 RPM. Designed, built, and supported in the USA.