Feature:* fresh excessive quality*Easy to put in and save space*Sturdy steel material, for coating, demanding to rust, waterproof*They are designed to be screwed into the headboard and foot board of the mattress frame to hold the centre beam in place.Specification:*Material: stainless steel/iron*Colour: as show*Size options: clip 40mm, clip 30mm, clip 20mmPackage Contents:1 pair of mattress connecting connectorNote:1. Due to many points comparable to show brightness and light-weight brightness, the particular coloration of the object could also be slightly varied from the picture displayed on the website.2. Please enable slight manual measurement deviation within the data.