One replacement Nikon Right Eyecup identical to that which was originally supplied by Nikon with the 10x40 Monarch Binocular. This model only fits the side of the binocular which you use to observe with your right eye. You will need the corresponding left side eyecup (#6816) to replace a pair of eyecups for the binocular, of course.
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Product worked! fixed my binoculars!
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