The "K&F Concept Eyepiece Cover & Hot Shoe Cover Kit" includes two each eyepiece covers and hotshoe level inserts. Both of these items in the DK-21 configuration fit the Nikon D750 perfectly.

The eyepiece cover is well made with a rubbery coating over the slide on fitting. It seems thicker than the one I originally had on the camera although that is by memory as the OEM model was replaced over a year ago when it began to slip off the camera mounting. The hotshoe level inserts are also made of a rubbery material which slides onto the hotshoe easily and enables quick and effortless levelling of the camera along the vertical axis. A cleaning cloth is also included in the box.

This is far from the first K&F Concept product I've ordered for my Nikon and will be far from the last. Their products have proven to be well made and sold at a reasonable price. This item is no exception and I highly recommend it to anyone needing a replacement eyepiece cover; it is another K&F 5-star product.

(Please see below for my rating criteria):

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Disclosure:

As noted by Amazon, I am part of the Vine Program which means that I acquire products at no cost in return for a truthful rating. However, although Vine Members pay nothing up front to get these free products they are considered by the Internal Revenue Service as taxable income at the full retail price at the time we get them and we, therefore, must pay taxes on these items.

On a more personal note I often read reviews for products I am considering buying and rely on those reviews that are detailed and come off as honest and full reviews on the product. I therefore try my best to give a true and honest review based on my own experiences with the product.

My Rating Scale:

1 star. This is the absolute lowest I can go and is a definite recommendation against being purchased.
2 stars. Less than average - having issues that I try to delineate in my review. I personally would not pay for this item.
3 stars. Average - neither great nor terrible. It will do the job it is supposed to do but without any obvious good or bad issues.I might or might not buy this item depending on the severity of my need or want.
4 stars. While the product is better than average it is not an excellent product. I would probably buy this product.
5 stars. Enough above average that it exceeds my expectations of how the product would and should perform. A product getting this rating is highly recommended.

Further middle ratings: The above explanation is the base of the recommendations I give in a review. Some ratings are further rated as soft (1/2 star below), solid (the star rating given) or strong (1/2 star above)