SkyTech Propane Conversion Kit for 18-21 inch Logs (LPK-18) Propane conversion kit for Skytech valve kits To be used with 18-21 inch gas log sets Compatible with Skytech's AFVK, AFVK-SP, & AF-LMF valve kits Converts your natural gas fireplace to propane Includes: #50 orifice, connector elbow, 1/2 x 3/8 inch connector, propane pilot orifice, and vermiculite