Excellent Ink Caps for Tattooing. Easy Set Up. Just snap together and get to work. More stable than standard caps. Stack-able and reversible for small and large caps (comparable to #9 and #16). Measuring lines for reliable mixes. Stack to prevent drying and contamination on long sittings. Less splatter for cleaner working. Snap them together or use individually. Open faced for visibility. Countless fun configurations. Made for Tattoo Artists by a Tattoo Artist.