1.bricks are made from high quality bauxite 2.accurate dimension 3.high strength High Alumina Bricks for general uses are made from bauxite of super quality, bonding chamotte and additives. The advantages of these products are high refractoriness, anti alkaline/acid erosions, good strength under high temperature and good thermal shock resistance.They were widely accepted in thermal equipment of metallurgy,petroleum,  chemical industry, construction materials, machinery and militaries  etc. Specification:  

Item	LZ-75		LZ-65	LZ-55	LZ-48
Al2O3,  %             min	75		65	55	48
Refractoriness      min	1790		1790	1770	1750
RUL                      min	1520		1500	1470	1420
P.L.C.        1500 X 2h	0.1-0.4     1500 X 2h				0-0.2
A.P.                     max	23		23	22	22
CCS                     max	53.9	49.0		44.1	39.2