Stainless Steel External Render Stop Bead is only available in the one size of 3000mm and in a box of 50. They are for outdoor use and designed for protecting the lower edge of cement based renders. They can, however, be used internally for extreme conditions such rooms that are susceptible to a large amount of damp, such as basements. They are attached using stainless steel nails or staples. For any information or queries regarding this product or any in our range, please contact a member of our team today.