* Fast, FREE Shipping * Best Guarantee in the Industry CO2 Power DusterReusable Cleanerwith 4 cartridges!for use with any 16g Threaded CO2 refill cartridges Works with All Standard 16g Threaded cartridges! (4) New CO2 cartridges are included in this listing Professional Grade DesignBrass Valve connector with inside threadingto allow for directional nozzle (not included)Heavy Duty Construction built to LastHousing encloses cartridge to protect user hands How to use: Unscrew valve head from cartridge housing (long cylinder)Gently twist on 16g threaded cartridge most of the way until it stops(It is important to twist on the cartridge First before the housing) Twist on housing and allow it to turn the cartridge 1 turn or until punctured by receptacle piercing needle in valve head(this will not necessarily make a "pssst" sound) Flip valve lock to allow trigger to engageGently squeeze trigger to blast dust awayCaution: it is powerful! In the interest of the environment, and to keep costs low,this item does NOT offer any consumer retail packaging It is New, unused and within 6-12 months of manufacture We ship USPS Priority Mail with tracking the SAME business day as your paid order! Mon - Saturday, excluding postal holidays to reach most US addresses in 1 - 3 biz days Buyer assumes all responsibility for safe handling and use of device in accordance with local, state and federal regulations. Not for use by minors without adult supervision. Seller, manufacturer and distributor are not liable for injury resulting from use of this item.