Used to secure Glass, Aluminium composite panels or Acrylic against a wall surface. Product Features Stainless Steel Accommodates panels 3-6mm Can be used with glass, aluminium composite panels, acrylic and etc These fittings require pre-drilled holes in the material surface Sign material excluded Custom graphic design and printing available but not included Size: 40 x 40mm. After comparing online prices, www.marvel.co.za should be the cheapest on this product.