... after-sale service.1. product specification: Chrome steel balls, diameter 2" (50.8 mm) G40, G60 grade(1) precision ... G28, G40, G60(2) process range from 3/4" (19.05 mm) to ... total amount as deposit, the balance 70% Before Shipment(2) 30% T/T in advance.70% L/C at ... -85502763Mobile NO.: +86 13009476658 Chrome steel bearing balls, diameter 2" (50.8 mm), G40, G60 grade balls