Spherical Mass Set, Each of 1 Set

Details

This Set Includes Four Balls With A Diameter Of 2.5 Cm Each, But Features Various Masses, Including A Hollow Steel Ball, Solid Steel Ball, Plastic Ball And Aluminum Ball, Applications-Race The Hollow Steel Ball And Solid Aluminum Ball Down An Incline. They Have About The Same Mass, But The Solid Aluminum Ball Has A Much Larger Acceleration Down The Ramp, Fire The Yellow Plastic, Solid Steel, And Hollow Steel Balls From A Projectile Launcher.