SpectrometerItem Description:The spectrometer consists of a telescope and a collimator mounted on a stable heavy C. I. base with three leveling screws. The protected 150 mm (6") or 175 mm (7)" scale divided into 0-360 degrees in steps of half degrees can be read from both scales & moves along with the telescope to give its exact position. It gives accuracy of one minute of an arc or 30 seconds of an arc. Telescope is having an achromatic objective of 7" focal length and a Rams den Eye Piece with cross line gratitude. The collimator is also fitted with 7" objective & adjustable precision vertical slit with jaws of non rusting metal. Both the telescope & collimator are having fine rack & pinion motion. In thecenterof the table there is a prism table for clamping of prism or diffraction grating. Packed in a sturdy wooden box with instruction manual & duster. L Available in Brass and Stainless Steel scale in both the sizes of 15.0 cm (6") and 17.5 cm (7") of protected circle. STORE POLICIESIMPORTANT INFORMATION ON OUR POLICY AND FEEDBACKWe try to be fair and accurate with all of our product listings and descriptions. Please read each product, buy, and sale carefully.We will appreciate it if you please email us before leaving negative feedback. If there is a problem, we can work together to resolve it. We strive to always be extremely fair and always try to work with reasonable customers.Negative feedback doesn't go away and should only be left as a last resort! We strive for positive feedback, harmonious relations and even friendships.We will always make every attempt possible to resolve issues if we made a mistake(It happens). Please do not assume a mistake is intentional.Let us know if our service could be better!!PaymentWe accept payment via PayPal secure online payment center.ShippingSmall item orders are shipped within 2-3 business days after receiving a cleared payment (Excluding Weekends)For a Larger item, orders are shipped within 7-10 business days.Items ordered together are not necessarily shipped the same day or in the same carton.Damaged ItemsIf you receive a product that is damaged in shipment please email us immediately, within2 DaysofDelivery Date. We can file a damage report with the shipping company and make arrangements to resolve the damage. Any and all damage must be documented withphotos of the damageand emailed to us within 2 days of delivery date (this is required to file a claim with the shipping company).ReturnsAll Returns must beAuthorized.Accepted AUTHORIZED returns must be received at our location within7 days of the delivery date, in NEW & UNUSED condition. The Buyer is responsible for returning the product in NEW, RESALEABLE condition. It MUST arrive UNUSED in it's original packaging, complete with ALL accessories & user manuals, warranty documentation etc. If ANY original parts, accessories, documentation, packaging etc are used, damaged or missing a 50% re-stocking fee will be charged. We will either EXCHANGE your item or offer MONEY BACK (via PayPal ) minus the original shipping and insurance costs Please email us for further instructions BEFORE returning your item. The returning item must be fully INSURED to prevent loss or damage. The BUYER is responsible for the costs of shipping and insuring the returning item, and if applicable the cost of shipping the exchanged item. We will notify you once we have received and processed your returned item. All items are subject to a 15% re-stocking fee.