For counting bacterial colonies. Features 11.5 cm (4.5″) lens with 1.5x magnification to eliminate parallax erros; 40-watt tungsten bulbs to illuminate dark backgrounds; Wolffhuegel guide plate and 3-wire cord. Accomodates Stewart plates. Sheet metal case. Dimensions: 25 x 28 x 27 cm (10 x 11x 10.5″). CSA certified. 220V