Specification: Product: Bed Slat Center Cap Width: 55mm Height: 9mm Material: Plastic Color: White Package includes: 10 x White Bed Slat Center Cap The distance between the two plastic pins on the plastic cover is 34mm. It is suitable for boards with a width of 53-55mm, a height of 10-11mm and a thickness of 7mm to 9mm. These bedstead frames hold your slats to the frame. These retainers are mounted on the side of the bed frame and on the center support rail using two pins, which you can secure to the bed frame using pre drilled holes. Due to manual measurement, please allow 1-2mm error.