... , Gravity castingSizes:From 1" to 4" 1. Can I add logo to the products? Yes, but we usually ... needing a factory to develop for you, 3. How can I know the material is correcct and acceptable?Material certificate ... We are not able to put every product we can do on this site, however, we have many years ... to pay the freight.7. Do you have Min. order amount requirement?We do not have min. order amount ...