TSUKINEKO-Ink Droppers. Ink droppers are versatile tools that can be used for fabric art; quilting; marbling; scrapbooking; stamping; diluting and many other creative projects! This package contains twenty-five 3-1/2 inch ink droppers. Each holds a maximum capacity of 1.5mL. Conforms to ASTM D4236. Ink not included. Imported.