Enviro-Safe R600a Refrigerant 6 oz (170g) canister. Suitable for compatible refrigeration unit charging and maintenance. I ordered this can of refrigerant thinking I could use it to fix my fridge but replaced the fridge before it came. Not returnable so if you need a can I have one for 20 bucks. Paid 26 on Amazon and had to wait a week to get it. New and unused. This is the type that you pierce the top.