We manufactured washers for billiard cues at the request of a customer! Please check the images for how to use them! *The 1st and 2nd images are for reference. Size Outer diameter φ21.4mm Inner diameter φ9.5mm Thickness 2.0mm Plain weave, matte Set of 4 As we are a company specializing in carbon processing, we can also accommodate other desired sizes and quantities! [Customer Feedback] Compared to stainless steel, the impact transmitted to the grip felt lighter. It's hard to explain, but with stainless steel, the weight of the ball is transmitted directly to the grip, whereas with carbon, the impact felt much smaller. It's a tricky aspect of billiards, and I thought this was an item that depends on "what kind of feeling you prefer," rather than being good or bad. If I were to recommend it, it would be for female players. I thought it might be easier to make the ball run even without much strength.