Rockefeller ngumu mpira press kichwa kipenyo niKiwango cha 1.588mm(Kutumika kwaya,F,yanayaviwango vya),

Kiwango cha mm 3.175mm(Kutumika kwaya,ya Hnaya Kviwango vya),

6.35mm(Kutumika kwayanayaviwango vya),

Kiwango cha 12.7mm(Kutumika kwayaScale) chuma mpira kichwa;