LW Scientific 20-250 rpm 220V Digital Rotators. Its the ideal space-saving instrument for procedures that require constant or timed rotation (mixing) such as RPR VDRL latex tests and for procedures that require a nonstandard speed. Specifications for LW Scientific 20-250 rpm 220V Digital Rotator: Manufacturer: LW Scientific Power: 110 - 220 volts Width: 10 in Height: 5.5 in Weight: 8.6 lb Features of LW Scientific 20-250 rpm 220V Digital Rotator Widely used in VDRL RPR and EIA tests Stable and quiet operation Clear humidity tray Variable speed timer control and continuous operation Package Contents: LW Scientific 20-250 rpm 220V Digital Rotator LW Scientific RTL-BLVD-24T3: 20-250 rpm 220V Digital Rotators