The product is a box of 1000 M5 x 13mm rivet nuts, made from steel with a flat head design. They come in a zinc finish and are suitable for a grip range of 0.5-2.5mm. Ideal for fastening and hardware applications, this limited stock item is a reliable and durable option for various industrial uses. We have surplus stock so are selling these cheap! They won't be getting restocked once they've gone!