Petri dish holders can be made from 1mm anodised aluminium or 0.7mm stainless steel. The design includes a fold down stainless steel handle for transport, there is the option to have an engraved label or label holder fitted to identify the unit. The base of the unit can be flat or inverted depending on the specification required. Aluminium petri dish holders are available in a variety of colours including, black. red, gold, blue and purple. Petri dish holders can be used for storing a range of different size petri dishes. The most popular design is the PT30 which holders 30x 100mm dishes other varieties are available such as the PT45 which holes 45 or the PT60 which holds 60x 55mm dishes.