OIL WELL CEMENT conformed with API CLASS G specs 10A, HSR&MSR. Specification(Class G,HSR): 1. Chemical Content: MgO: 6.0%Max ... ,60 Deg. C., atm.): 10.3MPa(or 1500PSI) Min; Consistency(15-30minutes stirring period): 30Bc Max;Thickening Time: 90 minutes Min ... bulk bag.4. Shipping by container or bulk carrier. CLASS G CEMENT