These Delock keystone covers can be used, for example, as dust covers. With its standardised dimensions, it can be used for easy snap-in mounting in various brackets, such as keystone patch panels, boxes or enclosures. Technical data - For installation in 19.2 x 14.9 mm keystone brackets - Dimensions (LxWxH): 18.9 x 17.9 x 21.4 mm Package contents - Keystone covers, four pieces https://elecena.pl/product/17877396/86314-delock-keystone-cover-white-pack-of-4 2021-04-25 https://elecena.pl/product/17877396/86314-delock-keystone-cover-white-pack-of-4 2022-05-18