Roll Off container tarp system fits 20, 30 & 40-yard boxes. This kit includes a waterproof vinyl roll over tarp and all necessary hardware to complete the tarp kit for roll-off containers. If you are looking for a different size tarp or roll-off box tarp system then please call us. We make roll-off tarps systems for all size waste containers. This roll back container storm water tarp system will work great for any size roll-off container.