Schutt Youth Spike Installed Pitch Rubber (White, 4-Inchx 18-Inch) Go to amazon.com Related posts Best pitching rubber 18 for 2022 FeatureReduces maintenance for upkeep of pitcher's moundEasy to use and portableIncludes mesh bag Size: 4" x 18" Schutt...The Gear That Makes The Game! DescriptionMade of heavy-duty molded white rubber with metal inserts and three spikes for installation. Great durability and economy.