Creative Hobbies KM2 Kiln Sitter Cone Support Replacement Bars, 2 pcs These Kiln Sitter Cone Support Bars fit all Dawson Kiln Sitters Used to hold the small cones in place for kiln firing temperature accuracy. To use, insert the cone supports into the slots in the Kiln Sitter porcelain tube. Package of 2, each 1.35" long x .35" wide.