Our malicious program material is Tin bronze.We can also assemble double-stage bug gear reducers to be with a number of hundred or several thousand pace ratio followed to diversified buyers' requirements like 2000:1,4000:1.We are a pro leading manufacturer of worm gear reducers and system ideas with 30 years history.Please go away messages in regards to the tools ratio, input shaft, and the flange type you need yet don't find within the product link when you make order.We can only show elements of them in your choices as the link has a limit to the number of them we could upload to show. We are so sorry to bring you a lot troubles during shopping about this.And this product link solely entails bug equipment reducer CYRV50-VS(if you would like it's pics,please contact with me),no connected equipment and no motor . If you wish them,please click related accessories clicks in our store.And please scan under QR code forour e-catalogue for CYRV series,CYRW sequence and CYVF series products' technical parameters while you need.And please click on beneath link for our CYCM sequence of products' technical parametershttps://www.chinachenyue.com/en/sys-nd/21.htmlYou also can click on under pics for browsing our different Sku# from different series.Our Test Reports and Honors:http://tsouz.ru/Docs/IntAgrmnts/Pages/fizlica.aspx