We are Cnscope,and we are professional microscope supplier, we have our own factory and also have several co-operative enterprises,so we have multiple microscope part,in future,there will be more items listed in our store,we have our own technicians to check all the items before sent out,and also have professional workers to pack packing,so there is no extra worries.welcome bid,if you have any more question pls feel free to contact us first,thankyou. welcome wholsaleryou will get what you want New RMS Adapter Microscope Objective to NIKON AI DSLR SLR Camera Product Feature: adapter (made of aluminum, anodized black) to use microscope objective lens with RMS thread (.8"X 36tpi) to your Nikon AI camera. adapter was made by Full metal, durable this adapter fit the following Nikon type: D40 D3000 D3100 D5000 D5100 D80 D90 D200 D300,D300S D7000 D3000 D60 Directed from factory,welcome wholesaler The package including : adapter from Nikon AI to RMS (.8"X 36tpi)thread Directed from factory,welcome wholesaler