SK85 is the vibratory media kit or commonly referred to as a starter kit for the Model 85 vibratory machine.
The SK85 includes the following:
450 pounds of AC3S50 1-1/8″ x 3/8″ – P-20 ceramic media
1 gallon of BKS-60 (048) vibratory compound
1 gallon of AR-60 (047) vibratory compound