Made of tough injection molded ABS plastic with reinforced front and side edges * The box stacks securely and easily on one another with or w/o the lid * The dough balls rise very well with no "crust" to worry about * Grate quality used in bakery"s and food shops for proofing or to store pastry in the fridge * Dishwasher safe, Dimensions: 18" x 26" x 3"