710 King Pen cartridge – Designed to vape at a temperature right below combustion. 710 King Pen was founded in Los Angeles, California,We tried the OG Kush prefilled cartridge and found it comparable in strength and flavor to other top brands. It’s a heavy hitter that put us on the couch, which is exactly what we wanted. But no matter the potency (they have a handful of strains and THC-strengths available) we can rest assured their state of the art facility produces only the highest quality oils on the market.