HunterLab offers sealed top cells in all standard cell path lengths for the color measurement of transparent liquids that have volatiles; are corrosive or if spills are a problem. These capped cells are the same as our regular cells with the addition of a annealed glass top; two screw tops (one for pouring, one for air purge) with black polypropylene caps and white Teflon liners. 20 mm path length x 55 mm wide x 57 mm high