Square Slate Tile Top Fire PitSquare Slate Tile Top Fire Pit Introducing the high performance Square Slate Tile Fire Pit by AZ Patio Heaters. You'll be able to enjoy a warm fire on those cool nights in style. This four foot square fire pit has 50,000 BTUs, so you can get the perfect fire no matter where you are. It comes complete with a hose and regulator, so you can easily hook up to a 20lb propane tank. The stainless steel burner is 3" deep and 17" wide with a 17" length, so