Inner dimension of the drawer : W 22.5 x D 34 x H 8.5 cm . Casters can be attached . Drawer withstand load (with casters): approx. 3 kg , top plate capacity : 2 kg Maximum stacking: 3 steps . Delicate workmanship makes this polypropylene case smooth at the corner, keep good sealing, and also easy to open and close. With the stackable option, it is easy to upgrade the storage space to your desire and enhance the storage system. The 3 steps system comes in a dimension of W 26 x D 37 x H 32.5 cm, perfect for keeping the most valuable articles and papers.