1)ISO9001:2000 2)mg content 99.9% 3)External diameter ~ 200 mm;Internal diameter ~ 20 mm 4) ... ,1.5kg,0.5kg etc. *commodity: Magnesium cylinders Mg content 99.9% External diameter ~ 200 mm Internal diameter ~ 20 mm Weight: 300 ... gr, 500 gr 1 kg , 1,5 kg , 3 kg 3,5 kg 5 kg .If you interested in our products, please ...