We are a professional optic factory. Our factory established in 1991.We are making Dichroscope, Spectroscope, Chelsea Filter, Measuring Microscope, Polarisocpe, Dark Field Loupe, Gem Refractometer, Handfree Desktop Light for Polariscope/dichroscope.We ship from Portland, Oregon, USA.There are many company on alibaba or similar trading webasites called theirselves manufacturer, but from their product page, they have more than hundreds of kinds of product. by such many products, there is impossible to make all of them by a normal company, the only reason to explain this is they buy and sell. We garranttee the lowest price and best compareable quality!We accept check, Paypal, money order any all other payment make it easy!For comstomer within USA, we ship through USPS priority flat rate box which is only 10 dollar for up to 70lb weight. For customers outside USA, we can ship by EMS, DHS, we are contracted customer with EMS,DHS, we have 50% off on the globle shipping cost. We can ship other economic method according to customer&＃39;s requires.