The ST95085 TerraKing Commercial Bag was designed for stand on mowers with a grass catcher material collection system. It's made of the same heavy-duty nylon material as our Pro Bag, which is perfect for those picking up leaves on rough terrain. The TerraKing ST95085 Commercial Leaf Bag offers a maximum bag opening circumference of 78 inches, with 12-Cu. Ft. Capacity. To attach the Commercial Bag to your mower, remove the door from your grass catcher, drape the leaf bag's opening over the grass catcher, and tighten the cord lock to secure it in place. While in use, abrasion-resistant polyester ensures that you're investing in a durable leaf-collecting solution for use season after season, and a nylon-bottom gives you even more protection against rough terrain. Additionally, our design promotes airflow while trapping dust and debris, which results in less mess while you collect your leaves. All of our leaf bags are proudly made in the USA. This bag requires a grass catcher; however, a grass catcher material collection system is NOT included in the purchase of this bag.