Rubber balls are suitable for the T4E products from Umarex with a caliber of .50/12.7 mm.
They consist mainly of rubber and have a steel core that ensures that the weight of a rubber ball comes to 44.9 grain/2.9 grams.
The T4E Performance RBI Steel Core .50 44.9 grain rubber balls from Umarex are packed per 100 pieces in a polybag.

Details:
*Brand: Umarex
*Type: Rubber balls
*Caliber: .50 (12.7mm)
*Weight/Grain ball: 2.9g / 44.9gr
*Packed per 100
*Color: Black
*Suitable for the Umarex T4E .50 line