Foil-wrapped tube of ten 1.25" (33mm) diameter charcoal tablets for burning resin incense. Light a tablet, let it heat, then sprinkle on resin. These are Three Kings brand tablets which light readily, and stay hot for 20-30 minutes. (Other brands we've tried have been difficult to light) Too much resin at one time can extinguish the tablet. Burn a little then keep adding small amounts. Holland.