Here's a liner by builder Sergey Spigel.
This tattoo machine is designed for outlines. Optimum machine perfomance is achieved with the 6.0-6.5 V voltage and 7 to 11 needles for liners. It is also recommended to use soft grommets while using this machine.
Manufacturer: Spigel Tattoo
Product Type: Tattoo Machine
Machine Type: Coil Tattoo Machine
Purpose: Liner (7-11rl)
Frame Material: Steel
Machine Connection: Clip Cord Connection
Voltage adjustment: 6.0-6.5 V
Duty: 135 Hz/58%
Weight: 7 oz