The metal box is double-ended so that two groups of students can work independently with the same box. Slide apertures accommodate colour filters for colour-mixing experiments and have blanking plates for when the apertures are not in use. The box is fitted with a 12 V, 24 W straight-filament lamp at the centre, while at each end is a sliding grooved frame to carry a convex cylindrical lens together with a slit screen and/or filter. It has long clear tracks, a triple-slit screen, two blank plates for closing the side apertures when not in use, and 1 m of twin flex. Dimensions 308 x 63 x 115 mm high; supplied without lenses, filters or other accessories.

We are manufacturers and suppliers of the Ray Optics and Colour Mixing Box, serving Algeria, Argentina, Australia, Bahrain, Bangladesh, Belgium, Bhutan, Brazil, Cambodia, Cuba, Cyprus, Denmark, Ecuador, Egypt, Ethiopia, Finland, France, Georgia, Germany, Ghana, Hungary, Iceland, Italy, Japan, Jordan, Kenya, Kuwait, Malaysia, the Philippines, Tanzania and Uganda.