Check the listing for details. CHUNKY BICONE Graphite Molds, 4 Versions, Premier Graphite Glass Tool. Condition: New. Listed at 56.00 USD. ----BR-21 Small Chunky Bicone CGBeadroller Cavity Sizes (mm) 4mm mandrel slot14x25, 15x30, 16x35 ----BR-22 Medium Chunky Bicone CGBeadroller Cavity Sizes (mm) 4mm mandrel slot17x40, 18x45, 19x50 ----BR-128 Large Chunky Bicone CGBeadroller Cavity Sizes (mm) 4mm mandrel slot20x55, 21x60 ----BR-129 X-Lg Chunky Bicone CGBeadroller Cavity Sizes (mm) 4mm mandrel slot22x65, 23x70 CGBead tools are the premier graphite beadroller, and bead-press, tools of the hot glass industry. Graphite mold made for the lampwork industry.(beads not included) Beadrollers not only help you with those difficult curves,but also act as a measuring guide once your first bead is in the kiln.There's no more guessing if the next one will be the same size!! There's also a handy little area for marvering on the front. The reversed side is a flat marvering surface.