Product Name: Large 6063 T5 Extruded Aluminum Heat SinkCategory: Aluminum ProfilesDetails:I am contacting you from Spain. We are an electronics manufacturing company. Currently, we are working on a new product with PoE that requires a heatsink. I have found that you have one that seems to meet the dimensions we need 85x30mm. We would need them to be 31mm in length. Right now, we are in the prototyping stage and we would need a couple of samples for testing how they perform on the product. If everything goes right, I think that our first order would be for 400 units. We would need to have four threaded holes on each heatsink with the placement we will inform you. The 400 units will probably need to be anodized in black also. Please, let me know the following information:1. Can you supply us with a couple of samples with the 4 M3 threaded holes as I will define before doing the big order? Our purchasing department will take care of it. If yes, then please provide me an email, in which I can send you the specifications for the holes. It may also be easier for holding this conversation.2.Can you give me a quotation of how much it would be for the 400 black anodized units with 4 threaded holes (85x30 x 31mm on the free dimension)?Thanks a lot for your attention.Place of Origin:CN;FUJGrade:6000 SeriesTemper:T3-T8Application:Heat SinkShape:FlatAlloy Or Not:Is AlloyBrand Name:DKApplication:Heat sinkMaterial:6063/6061/6005Surface finish:Anodized .powder Coating.polishing.sandblastingProcess:Precision CNC MachiningColor:Silver, Black, Blue,RedUsage:heatsinkLength:CustomizedProduct name:Large size aluminum heat sinkSize:10mm-500mmThickness:0.5mm-50mm Best Regards. Show More