SK200 is the vibratory media kit or commonly referred to as a starter kit for the Model 200 vibratory machine.
The SK200 includes the following:
50 pounds of AC3S50A 5/8″ x 1/4″ – P-20 ceramic media
1 quart of BKS-60 (048A) vibratory compound
1 quart of AR-60 (047A) vibratory compound