Nice Combination: You will receive 16 sets of stainless steel standoff screws, including 16 standoff screws, 16 screws, 16 expansion screws, a nice combination and enough quantity to meet your demands and replacements. Proper Size: 19 x 30 mm, the proper size is easy to use and will bring you a satisfactory using experience, please confirm the size before purchasing. Reliable to Use: The standoff hardware is made of stainless steel, which ensures strength and lightness on the basis of light weight and easy to use, rust-proof, scratch-proof and corrosion-resistant, support you can use for use. Wide Range of Applications: Wall panel hardware is a choice for businesses, offices, shops, stores, rooms, such as glass panels, acrylic panels, acrylic plates, acrylic photo frames, indoor and outdoor advertising signs, photos. Easy to Install: Install the expansion tube into the wall and fix the spacer screw with screws, the contact between the screw and the product is protected; Please note