Flame King Refillable 1LB Empty Propane Cylinder Tank - Reusable - Safe and Legal Refill Option - DOT Compliant-16.4 oz (2-Pack), green (YSN164-2)ITEMS INCLUDED (2) Refillable Empty 1LB Propane Tanks, (2) Caps, and (2) Allen Keys 2mm (5 64") in size REDUCE WASTE Keep disposable propane tanks out of the environment by using the Flame King 1LB refillable cylinders SAFE TO USE Flame King refillable propane tanks are the only 1LB tanks Certified by the DOT as legally and lawfully refillable and transportable; it is not safe or legal to refill and transport disposable 1LB tanks SAVE TIME Refill from