High-grade steel-welded construction; premium OPD (overfilling protection device) valve assembly DOT approved, X-ray and hydrostatic tested powder coated for long-lasting exterior protection Our propane tank is commonly referred to as a "10LB propane tank" or a "11LB propane tank" in the industry, but its accurate capacity is 10.51lbs. We use "10lb" for simplicity, acknowledging the industry's varied terminology NOTE: The propane tank is empty and ready to be filled with gas