TankFoot Tank Stabilizer reduces the risk of a propane cylinder tipping while transporting in your RV, pick-up, car, or at a campsite. WARNING: This product can expose you to chemicals including lead and lead compounds which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information visit www.P65Warnings.ca.gov Fits 20lb, 30lb, and 40lb cylinders High-strength plastic construction Light weight Increased stability