When you buy our grates in full lengths you will notice some markings (like scratches) at each end. This is completely normal; they are just marks from the clamps necessary for the anodising process. These marks can take up to 100mm (usually much less) on each end of the grate and are ADDITIONAL to the product. To clarify: When you buy a 5.6m grate you actually receive 5.8m of grate to account for markings. When you buy a 3m grate you actually receive 3.2m of grate to account for markings.