This case contains fifty #550 shred bags from Whitaker Brothers. We have these bags custom made at a plastics factory to ensure they are of the highest quality and are a sturdy 4 mm thick. Using regular garbage bags in your shred bin obscures the contents, unlike these clear bags. More importantly, a standard trash bag is prone to tearing whereas our bags are proven durable. There is nothing more irritating than shredded paper strewn everywhere - avoid this by investing in the best bags for your shredder!