Physical properties
Brand	MGe-20A	MGe-20B	MGe-20C	MGe-16A	MGe-16B	MGe-16C	MGe-12A	MGe-12B	MGe-12C	MGe-8A	MGe-8B	MGe-8C
Index
MgO	50	45	40	55	50	45	65	60	55	70	65	60
Cr2O3	20	20	20	16	16	16	12	12	12	8	8	8
Apparent porosity	18	19	22	18	19	22	18	19	21	18	19	21
Cold crushing strength	35	30	25	35	30	25	40	35	30	40	35	30
Refractoriness under load (0.2MP)	1700	1650	1550	1700	1650	1500	1700	1650	1550	1700	1650	1530