Installation Steps Step 1: Open the packaging and prepare all accessories. Step 2: Align the armrest with the two holes on the base and insert it. Step 3: Find the corresponding hole of the plug and insert the plug. Step 4: Lift the mattress that requires armrest installation. Step 5: Just put in the installed bed armrest. Step 6: Once the armrest is installed, it can be used. Specification Material: High-carbon Steel, Plastic Color: Black, White, Silver Style: Modern Assembly Required: Yes Shape: L-shaped Surface Process: Electroplating, Baking Varnish Product Care Instructions: Wipe With Damp Cloth Applicable Mattress Thickness: Over 5cm/1.97in Flat Tube Thickness: 1.5cm/0.59in Strap Length: 3.6m/11.8ft Net Weight: 1.9kg/4.191bs Gross Weight: 2.