Kitchen Appliances These types of units are principally fabricated from printed corrugated board, acrylic, sheet metal, Kitchen Appliances, steel wire, vacuum-formed plastic, and wood or indeed a combination of more than one of these materials. The choice of material is often dictated by the length of time the display unit will be in store. Printed corrugated board is more suited to short-term promotional CDU’s due to its relatively low cost and durability of the material, whereas acrylic, metal, wood, etc. are more suitable for longer-term CDU’s due to greater durability of those materials.