SD Polymer has a first-class R&D and modeling center, which is always in the light of customers demand and interest．A variety of products can be custom-made. As for small-sized modeling，a qualifled sample or nearly qualified sample can be offered with 20 to 30 days。As for long-term customers, we can make a brand-new model with no charge．In terms of products-related and products-extended services，we can supply some of the spare parts of our products．