Are twin slot brackets strong enough to support a shelf layout?

Black Twin slot Shelves Storage & shelving black twin slot shelving Hi, So I've bought this twin slot shelving system to go up in one of our hallway cupboards blackjack supreme single hand perfect pairs slot Wall upright ideal for adding twin slot shelving as a stylistic and modern touch to a home office, kitchen, bedroom and even for commercial use or public

black mail slot The twin slot brackets system allows you to change things up when shelving I used and the wallpaper (Side note: You guys loved