Includes two pieces of polythene, 25 mm square and 10 mm thick, separated by a tin foil, mounted on a stand behind a 12 mm diameter aperture.

We are manufacturers and suppliers of the Jolly's Photometer, 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.