We are, 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 please feel free to contact us first, thank you.Welcome wholesaler!!You will get what you want!!Omnipotence Double Arm base With Stereo Zoom Microscope STL2+A1If our products have any problems, we can provide replacement / Return Service, welcome to contact us anytime!100% Satisfaction We are committed to providing you with high-quality products and intimate pre and post-sale inquiry service to ensure your satisfaction!