Here at the office, we fill DOT cylinders of all kinds (Grill Cylinders to Forklift Cylinders) from 8:00 AM – 5:00 PM M-F. We do not exchange cylinders, we re-fill your cylinders and charge by the gallon. We do fluctuate with the propane market, so our prices do fluctuate. But we make sure you are only paying for what you are getting! Come see us and meet our staff!