These burners can be connected to Natural or Propane Gas. Burner assembly is constructed from 304 stainless steel that lasts years compared to black iron pipe. This is the burner ring of choice for DIY homeowners and contractors for the last 10 years!If you are building a fire pit by stacking blocks or stones; when you get to burner desired height add a couple "bridges" (rebar or block) across the opening to rest the burner on top. Then continue to add block/stones to your final top height. You have built your fire pit, now back fill the pit with lava rocks. Lava rock makes a great backfill because it is inexpensive, allow for drainage, insulate heat, and provides great ventilation. Now place your burner ring directly on top of the lava rocks and top off with your favorite media fire glass, ceramic fire rocks, lava rocks and or outdoor rated logs. 18", 24", 30", 30"HC. 1/2" MIP (30"HC has 3/4 MIP). This item is in the category "Home & Garden\Home Improvement\Heating, Cooling & Air\Fireplaces & Stoves\Decorative Logs, Stone & Glass". The seller is "dreffco" and is located in this country: US. This item can be shipped to United States, New Zealand, Fiji, Papua New Guinea, Wallis and Futuna, Gambia, Malaysia, Taiwan, Poland, Oman, Suriname, United Arab Emirates, Kenya, Argentina, Guinea-Bissau, Armenia, Uzbekistan, Bhutan, Senegal, Togo, Ireland, Qatar, Burundi, Netherlands, Iraq, Slovakia, Slovenia, Equatorial Guinea, Thailand, Aruba, Sweden, Iceland, Macedonia, Belgium, Israel, Kuwait, Liechtenstein, Benin, Algeria, Antigua and Barbuda, Italy, Swaziland, Tanzania, Pakistan, Burkina Faso, Panama, Singapore, Kyrgyzstan, Switzerland, Djibouti, Chile, China, Mali, Botswana, Republic of Croatia, Cambodia, Indonesia, Portugal, Malta, Tajikistan, Vietnam, Cayman Islands, Paraguay, Saint Helena, Cyprus, Seychelles, Rwanda, Bangladesh, Australia, Austria, Sri Lanka, Gabon Republic, Zimbabwe, Bulgaria, Czech Republic, Norway, Côte d'Ivoire (Ivory Coast), Kiribati, Turkmenistan, Grenada, Greece, Haiti, Greenland, Yemen, Afghanistan, Montenegro, Mongolia, Nepal, Bahamas, Bahrain, United Kingdom, Bosnia and Herzegovina, Hungary, Angola, Western Samoa, France, Mozambique, Namibia, Peru, Denmark, Guatemala, Solomon Islands, Vatican City State, Sierra Leone, Nauru, Anguilla, El Salvador, Dominican Republic, Cameroon, Guyana, Azerbaijan Republic, Macau, Georgia, Tonga, San Marino, Eritrea, Saint Kitts-Nevis, Morocco, Saint Vincent and the Grenadines, Mauritania, Belize, Philippines, Democratic Republic of the Congo, Republic of the Congo, Western Sahara, Colombia, Spain, Estonia, Bermuda, Montserrat, Zambia, South Korea, Vanuatu, Ecuador, Albania, Ethiopia, Monaco, Niger, Laos, Ghana, Cape Verde Islands, Moldova, Madagascar, Saint Pierre and Miquelon, Lebanon, Liberia, Bolivia, Maldives, Gibraltar, Hong Kong, Central African Republic, Lesotho, Nigeria, Mauritius, Saint Lucia, Jordan, Guinea, British Virgin Islands, Canada, Turks and Caicos Islands, Chad, Andorra, Romania, Costa Rica, India, Mexico, Serbia, Kazakhstan, Saudi Arabia, Japan, Lithuania, Trinidad and Tobago, Malawi, Nicaragua, Finland, Tunisia, Luxembourg, Uganda, Brazil, Turkey, Tuvalu, Germany, Egypt, Latvia, Jamaica, Niue, South Africa, Brunei Darussalam, Honduras.