SPMB36120 3' x 10' Black Softball Pitchers Pitching Mound Mat With Power Line. Mark Your Stride Length and Location With Chaulk (Not Included) Made in the USA. FREE SHIPPING Regulation size pitching rubber. Size: 3ft x 10ft Color: BLACK Made From 100% Black Nylon Material With 5mm Foam That Is Spike Proof Black turf for a visual presentation of training with chalk lines, marks, circles for goals/limits of your pitcher. Use sidewalk chalk to mark on mat. (Chaulk Not Included)