Hammer makes The Emerald Vibe its a metallic type green, good for light to medium oil, Cherry Vibe almost same reaction as the emerald , then they have the Vibe Onyx (black) Med to Hvy oil, the drilling is whats key to the best reaction for your type of ball, also coverstock has alot to do with the reaction on different oil volumes and patterns, those are reactive resin, particle resin ( usually diamond or carbide) and Partical pearl, and urethane. Find the ball that fits your style.