Sprue Bases - Button Style

Button style sprue bases — also commonly called donut style sprue bases — are designed to fit securely at the base of casting flasks, providing a centered opening through which wax sprues are fed prior to investing. These sprue bases feature a raised center opening (the "button") that varies in diameter depending on the flask size selected, with the smallest size offering a center opening of approximately 3/8". Eight sizes are available to accommodate flask diameters ranging from 1-1/4" up to 4", making it easy to match the correct base to your existing casting flask inventory.

Features

• Button style (donut style) design with a centered opening for sprue attachment
• Available in eight sizes to fit flask diameters from 1-1/4" to 4"
• Center opening starts at approximately 3/8" on the smallest size and increases with flask diameter
• Designed for use with standard casting flasks in lost-wax casting workflows

Available Options