We are professionally producing Precision parts in China, ISO9001 certified. We have the automatic CNC lathe and professional engineer to make our good precision parts. 1. All the precision parts: Length: <100mm; Diameter: <20mm; Torerance:0.01mm; If any parts is within this scape, that's our business, we can make it with aluminum, brass, steel, etc; 2. We do not offer any read-made parts, we are making the custom precision parts as your drawings or the samples, pls confirm; 3. We usually do the business, like this step:1. Get the drawing or sample; 2. Quoted; 3. Make our own samples and send; 4. Win the business. We are serious supplier, if you ask us to make the sample, that is to say, you have accepted our pricing, so, we will make it and send u by Fedex/DHL free charge; We are not willing to discuss the pricing after approval of the sample. So, the pricing negotation will happen before samples and we don't waste our sample charge. Of couse, our pricing is very competitive, and lead time is fast.