T4E P2P Rubber Balls - 10 ct Tube Black. Practice and familiarize yourself with your P2P HDP 50 pepper pistol by using these rubber balls before ever loading pepper rounds in your less than lethal self-defense pistol from T4E and Umarex. Specifications for T4E P2P Rubber Balls - 10 ct Tube: Manufacturer: T4E Color: Black Projectile Caliber: .50 Caliber Package Contents: T4E P2P Rubber Balls - 10 ct Tube T4E 2292300: P2P Rubber Balls - 10 ct Tube Black