The best (most suitable) mold steel applied to different mold parts could help on cost saving too. And of course that it is under the nice mold design, otherwise, no matter how good the steel is, the quality of the mold would be general or terrible. The 5 gallon mold has been designed with the appropriate steel. In order to ensure the good quality that customers want, it can help to choose the right die steel, so what is the technical key in its manufacturing process?http://www.capmold-china.com/c....ap-mould/plastic-cap