The box is made of a high quality plastic it has a see through lid with two push down locks when you place the partitions in the box please make sure the rounded edges face down and then they will seal completely when the lid is closed the storage box has a convenient carrying handle the partitions can be placed as required according to the size of compartment required size approx 320 x 270 x 50mm w x d x h 21 removable partitions 55 x 45 x 50 mm