The module drawer’s & body are durable, beige ABS plastic. They slide on strong, long life, smooth metal mechanisms & are supplied as a 2 drawer module. They can be stacked or joined & are easily removed by the activating levers. They will fit 4 of our SPT012(100 x 100 x 300mm) spare parts trays. The size is 420w x 440d x265h mm external & 350w x 400 x 100h mm internal.