This set allows you to adapt the power of your SSX303. Not compatible with the SSX23. Easy installation within minutes. With different gases, BBs, and Hop Up settings, these nozzles can produce a wide range of power levels. 0.8-1 Joule – 2.3 mm insert (labeled) 1.3-1.7 Joule – 2.7 mm insert (labeled) 1.7-2.5 Joules – no insert
