CBD Terp Tanks were made using purest available CBD (All of our products are!) and strain-specific terpene profiles from XJ-13 and Wedding Cake (More to Come!) which include their own medicinal value and strain-specific characteristics. Each 1ml CBD Terp Tank contains 300mg or 500mg CBD and less than 0.3% THC. Will fit any 510 thread mod/pen battery. NOTE: Keep wattage on the low side and work up until the desired vapor production is achieved.