we are an ISO 9001:2000 certified trading company specialize in magneisum series material including magneisum ingot ,magneisum alloy ,magneisum anode, silicon metal ,calcium silicon , graphite scraps etc .pls kindly note the spec of our productsRe: magnesium ingotspec:99.9%min ingot weight:7.5kg,1kg,100g,300gMagnesium alloyAM50,AM60, AZ91D,AZ91HPGRAPHITE SCRAPSC:98%MIN; S:0.05%MAX; ASH:1.0%MAX; MOISTURE: 1,0%MAX;CALCIUM SILICONCA:28%MIN; SI:55-65%MIN