Includes: 1x Mini Nitrogen Regulator + fittings : Works with N2 or Co2 (details below)1x Box of Pure Nitrogen Bulbs (2g approx 1L volume @ 20psi)1x adapter to 8mm push fitting - (for use with 8mm or 5/16 tubing)Buy Extras: N2 bulbs - Buy extra boxes of 10 here: Gas line & adapter for Sodastream available here" (use 400g CO2 bottles Disposable nitrogen / co2 bottle adapter here: (Use 2.2L Nitrogen & CO2 bottles N2o (cream chargers) bulbs - Buy extra boxes of 10 here: Co2 - 16g threaded bulbs - Buy extra boxes of 10 here: Co2 8g unthreaded bulbs - Buy extra boxes of 10 here: Setup for n2:The base adapter of the regulator needs be changed over to the included bulb adapter for use with the nitrogen bulbs.The regulator comes default setup for use with screw in co2 bulbs.Included:1/4 inch gas flare outlet (female)Optional use check valveOptional stainless steel ball lock disconnect 60psi regulator Regulator comes default with a threaded inlet allowing you to use larger 16g and 25g CO2 bulbs Regulator comes with a spare unthreaded inlet with bulb holder allowing you to hot swap between CO2, Soda, Nitrogen, and Creamer bulbs in seconds View the 2.0 Multi Gas Mini Regulator instructions here: