This is a small silicone collapsible cup to give the most ideal way to apply kicker to your tires. Perfectly sized for 1/10 touring, 1/12th pan car, and f1 tires. Simply spray a bit of kicker into the cup, then quickly place over your tire. Wait 30-60 as the fumes of the kicker cure the CA and leave a perfectly smooth and shiny finish. This leads to all around better looking and more consistent fell to the tire rather than spraying kicker directly over it. Using this in conjunction with the Perfect Edge Tire Gluer and Gluer Guides will have you gluing your sidewalls like a pro in no time!