Nikon scope and eye cover

I have been looking and have not noticed or not found a Nikon scope and eye cover for a 4-16X42SF M BDC Monarch III #8422. I believe a number 19 Butler creek flip up will work for the eyepiece but i do not seem to see anything that will fit the objective. Thanks

You need to measure the outside diameter with a caliper and choose the appropriate size from the size chart. We don't suggest you use the Butler Creek chart that suggests cap numbers because it has a lot of wrong information in it.