The standard Portable Painter Classic Palette holds twelve colors. Our versatile, new Expansion Pans instantly increase this number from 12, to 15, 16 or even eighteen: With no increase in size or weight! These great new pans are engineered to fit precisely in the brush slot of the Classic palette. Once installed, they look and feel like original equipment. There are two types: Single cavity and Dual cavity. This set of eight includes four of each that can be intermixed to create the exact number of colors you prefer to carry. Both hold a genuinely useful amount of pigment: The Single cavity expansion pans have a similar capacity to a full pan. So they are ideal for frequently used colors. The Dual cavity pans each hold a little less than a half-pan, so they are well suited to specialty/accent colors. The pans come complete with reusable adhesive disks to secure them in the brush slot.