Compatible systems include: GraverMach, GraverMax G8. GraverMax SC, GraverMate requires Hook Up Kit #004-972., and GraverMax (requires Hook Up Kit #004-971). Airtact Filter Kit for GraverMax. This kit installs in the air supply line that runs to the Classic GraverMax before it reaches the stock filter/regulator mounted at the back of the Classic Max unit. This kit is required for the Airtact to run on the Classic GraverMax machines. The item "GRS Airtact CONTROL SYSTEM with Airtact Filter Kit for older GraverMaxs NEW $500+" is in sale since Saturday, June 27, 2020. This item is in the category "Jewelry & Watches\Jewelry Design & Repair\Jewelry Tools\Engraving Tools". The seller is "choicejewelers" and is located in Colorado Springs, Colorado. This item can be shipped to United States.