The all new Ninja Carbon Fiber Superlite Tank (90/4500) includes a SLP regulator for use in airsoft HPA tapped guns. The 90/4500 is the largest super light air tank made! The SL Super Light tanks weigh much less than other air tanks on the market. The tank includes a PRO V2 SLP output regulator pushing up to 300 PSI. This is perfect for all Wolverine and Polarstar systems (not for use with Tippmann). This beastly Ninja quality made tank is about as good as they get!