All Turf Mats PBBK36120 3' x 10' Black Softball Pitchers Pitching Mound Mat with Power Line Mark Your Stride Length and Location with Chaulk (Not Included) Regulation size pitching rubber. Size: 3ft x 10ft Made From 100% Black Nylon Material With 5mm Foam That Is Spike Proof Made In The USA 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)