The TOQi 510 Cartridge Holder is CNC machined from a single aluminum block to vape with care, the ultimate 510 accessory. Store up to 6 of your fave cartridges and protect them from UV exposure. The sun speeds up the breakdown of live resin/rosin causing it to lose THC potency. Keep your highs clean by ensuring the mouthpiece for each cartridge is off the ground, and by standing upright, the cart resin pools at the bottom of the cart.