Made in Holland, these excellent educational quality watercolors are affordably priced for the student or beginning painter. Choose opaque watercolors for gouache effects and solid coverage. Choose transparent for traditional luminosity. Each removable pan is 30 mm (1.18") in diameter and snaps into place in its sturdy case. Sets of six have plastic cases while larger sets have metal cases. A 5 ml tube of opaque white is included with each set.