Standoff Mounting Hardware: Sign standoff screws is a wall-mounted hardware designed to support panels of acrylic, wood, aluminum, Acrylic Glass, glass or any other messaging display substrate, and also used to support a glass table top on a wooden base. Diameter: 1/2 inch/12mm, Base Length: 0.59 inch/15mm, Cap Height: 0.16 inch/4mm, Thread Size: 15 x 8mm / 0.59inch x 0.31inch (length x diameter). Mounts are adjustable for versatility when signage needs to be moved or replaced. Rugged & : Made of high-quality stainless steel, -, scratch- and , ensuring a longer service life. Widely Used: Designers often use it to DIY a simple and attractive acrylic sign, install modern dry erase boards , and hang glass paintings or artworks . Wall mounting screws are a good choice for offices, supermarkets, shops, bedrooms, etc. They are not only beautiful but also practical. Specification: 12mm x 20mm colour: black Material: stainless steel Package Contents: 24 x pillars 48 x rubber gaskets 24 x screws 24 x wall anchor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.