These Umarex T4E Performance RBI Steel Core .50 44.9 grain rubberballs are suited for T4E products by Umarex with a calibre of .50/12.7 mm. They are mainly made of rubber and have a steel core that makes the weight of one rubberball come down to 44.9 grain/2.9 grams.
The T4E Performance RBI Steel Core .50 44.9 grain rubberballs by Umarex come packaged in a polybag per 100 pieces.