The cases are made from 7mm Astroboard, a lightweight but very strong polypropylene honeycomb material. The cases are fitted with interlocking aluminium sections to the joint edges to give a splash proof seal. Edges will be fitted with aluminium angle. Zinc coated pressed steel ball corners and edge brackets will increase strength and protection. The lid is secured to the base with two butterfly type catches at the front and with two hinges at the back. A recessed sprung handle will be fitted to the front. Internally the cases are fully foam lined to suit the projector with space for accessories.