A Koller Irons custom color packer is a hand-built coil machine tuned for the heavy, deliberate hit that drives saturated color into the skin in a single pass. Travis builds the frame, winds the coils with extra saturation, and tunes the spring set so the needle delivers maximum punch at a controllable speed — typically a 4.0–4.5mm stroke at a mid-slow CPS.
Color packers run hot under heavy use — Travis specs the coil wrap to handle long fill sessions without sagging.
If you run primarily 9M / 11M+ mags, mention it so he can match the coil saturation to your needle load.
A look at what’s come off Travis’s bench. Each machine is one of one — these aren’t necessarily custom color packers, just hand-built Koller Irons.



