Item Hazard Band Hazard Class 1 - Minor injuries, addressable with basic first aid kit or ice. Requirements for Use Required Badges Kaya Cast Vacuum Machine Prerequisite Badge Prerequisite Jewelry Evenheat Kiln Watch Video Pass Quiz Badge applied after successful quiz Facilitator Checkout No Volunteers Currently Assigned Instructions for Use Sprue size: 0.41" diameter, 0.25" length Small flask plaster ratio: 621g plaster, 243g water This is a Kaya Cast Vacuum Casting machine.