RENCON DEVIL SPIN 130 - BlackRencon Devilspin Tennis String 1. 30 mm 1. 25 mm 1. 20 mm Red Black The Rencon Devilspin is a high performance co polyester string designed for maximum spin, control, and aggressive play. With its unique pentagonal shape, this string bites into the ball to deliver extreme spin and unmatched shot precision. Whether you're hitting heavy topspin from the baseline or sharp drop shots at the net, Devilspin gives you the grip and confidence to dominate