"La Niña" power liner Fast and solid, will push any needle group you want with no problem at any speed. frame machined cnc from a solid block of 7075 aircraft aluminum 22mm diam fast Swiss Maxom Motor high quality delrin slide rca or clipcord connection motor positioned more towards the Tube vice 3.2 mm stroke with Hard hit recomended voltage between 5 to 7.5 volts