1.8 Grams Each Ball. Perfect Fit For Umarex T4E Walther PPQ/ TPM1 And Glock17/G17 Gen 5. Alien Play 43 Cal Ammo Are Top Class Aluminum Crafted, Better Than 43 Caliber Steel Balls Which Are Too Heavy. And They Are More Powerful Than Plastic Nylon Kinetic Projectiles And Rubber Rounds. Significantly Round, Well Polished, Glossy Silver Color, Uniform Size of .43 Cal. Great Projectiles For Self-Defense, Target Practice, Training And Recreational Shooting. Fly Straight And Far, Hit Hard And Accurate. Never Deform Even Hitting A Steel Target Or Concrete. Seamless, Flawless, Definite A Glass Breaker And A Window Puncher.