“The 300mm XL UniāSupport bundle delivers exactly what it promises: strong, uniform supports that make loft boarding and insulation work much easier. The quality is consistent across all 48 pieces, and the extra height is ideal for maintaining proper airflow above insulation. A dependable choice for DIY or professional use. I would like to add, ot would be great of the supports were pre drilled, it did take some time to drill holes for the screws to go through. That been said my last box did have some what I can only assume where returned supports, some still had screws partially in them others has holes drilled through, which in it self is not a huge issue, but I orders and paid for new supports...”