Rio Grande Cast-In-One™ Rubber Base, 44.45 mm

Designed specially for the Rio Grande Cast-In-One™ casting machine, this rubber base holds a 1-3/4"-diameter sleeve and is ideal for treeing and investing small models. Insert the Penta-form into the corresponding holes in this base, leaving a gap of at least 1/8" between the Penta-form and the rubber, and you're ready to begin building your tree.