This aluminum bead rack is notched to support 27 3-1/2 inch pins. Twenty (20) pins are provided with the rack. Beads rolled in our new Pro Bead Roller Sets need not be touched at all before being placed on this bead rack for curing. This rack has a solid aluminum base, so flat items can be cured under suspended beads. Your satisfaction is guaranteed. Pins provided need to be protected from moisture and high humidity. The size of this bead rack is 9" x 6" x 1-1/2". Polymer clay is the clay primarily used here at Poly-Tools, Inc., but other clay mediums can be used successfully with our bead rollers and dried on our rack. Your satisfaction is guaranteed with all of our products!