INCLUDES ALL 4 STROKE PROFILES! Neuma 4 anodized pen machines available in various finishes. Length: 90mm (3.6 in) Diameter: 27mm (1.1 in) Output: 8.5W Operating range: 4.5-9V Cams: (Includes all 4 stroke profile/cams in your choice of stroke length) 20% cycle, 2.75mm, 3.6mm, or 4.2mm stroke, autoclave compatible 28% cycle, 2.75mm, 3.6mm, or 4.2mm stroke, autoclave compatible 33% cycle, 2.75mm, 3.6mm, or 4.2mm stroke, autoclave compatible 40% cycle, 2.75mm, 3.6mm, or 4.2mm stroke, autoclave compatible Energy source: Electricity Connector: RCA Autoclave Compatible Grip: Yes Battery Compatible: Yes Carson Hill of Neuma Device has developed his fourth-generation tattoo machine, Neuma 4, after a few years of research with a particular interest in creating a ‘pen-style’ rotary tattoo machine that would place a strong emphasis on addressing the inherent limitations of traditional rotary mechanisms. The result is a multi-cam rotary mechanism that can line as quickly and effectively as a coil machine; plus shade, blend, and pack color efficiently, predictably, and reliably. Artists’ first impressions are very positive, and feel they are outstanding liners as well as very efficient with all styles of tattooing. After a bit of experimentation with the various cams Neuma offers, artists quickly realize the high degree of utility the system offers and grow to love them even more for their versatility. There are a number of Neuma 4 configurations that can appeal to artists of all types with all sorts of preferences. From grip size to weight, varying strike force and stroke length, there is certainly a configuration for anyone who uses Neuma 4 to suit any preference. Let your Neuma 4 conform to your personal preferences, rather than having to conform your tattooing style and approach to the performance of your machine. Fireside series w/ Carson (six+ episodes of excellent information):(Ty, Carson, and Jake):https://youtu.be/Zkbtv1H4gQISeries:https://youtu.be/zeeZKSKXA3c or https://youtu.be/lvMqdgbeq5shttps://youtu.be/VBVG3FcESQshttps://youtu.be/B133jo2cQ2ohttps://youtu.be/fTp88ZzJ4i8https://youtu.be/likhVt5kyKAhttps://youtu.be/l7kBVU-whroTy Pallotta review:https://youtu.be/tSZK6jDinwQNick Baxter interview:https://youtu.be/esjVC8bxqcgNeuma Wave Patterns:https://youtube.com/shorts/m_dg47suNyshttps://youtu.be/LL17rh0V2hUFloaty Lady review of Brass Grip and Machine:https://youtu.be/E8QQK38tt_M