C3yoyodesign's own silicone response system. The standard white medium pad is common in most of their models, and also fits all other yo-yos that take 19 mm pads. We also have the softer purple pads in medium, as well as their large pads for some of their older models. Model size break down is provided below.
Most Duncan and HardCore yo-yos come with some form of "sticker" respsonse. The Duncan Silicone Stickers provide long lasting response, and less aggressive than friction stickers for today's advanced string tricks. This 8-pack of stickers has a 13.7 mm I.D. (inner dimension) for use with custom ball-bearing models that include a larger diameter bearing.