"What can I say about a galvanised 20mm conduit trouser box? The galvanizing seems good quality and the threads are cut cleanly. I used these boxes for a garden lighting project and they are located outside so time will tell whether the coating is good or they start going rusty. They are cast malleable rather than the alternative pressed steel versions which I generally consider lower quality. A pity Screwfix don't sell the cast lids to go with them as the pressed steel ones are too thin and flimsy to guarantee weatherproofing without some additional sealant."