CBD Terp Tanks are made using the purest available CBD (All of our products are!) and strain-specific terpene profiles from XJ-13 and Wedding Cake to our new terp sauce carts (More to Come!) which have their own medicinal value and strain-specific characteristics. Each 1ml cart 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 to prevent damaging the coil and work up until the desired vapor production is achieved.