At o.Pen, not all concentrate cartridges are created equal. O.Pen Reserve is a product-line dedicated to developing the most robust extraction process possible centered entirely around quality and potency. This 420mg hash oil is “reserved” for those looking for the finest extracts possible. If you’re a frequent connoisseur, or just interested in exploring potent forms of cannabis, o.Pen Reserve is the product you’re looking for. This ultra-refined cannabis oil sits at the very top shelf of quality cannabis products. If you’d like to learn more about cannabis-infused concentrates, please contact The Spot 420 with any questions.