Boldtbags are made with utility patented rivet reinforcement, FDA compliant resins and are better because they are bolted. The reinforced construction makes Boldtbags extremely strong and ensures that these filter bags won’t burst. The grommets are durable marine grade, nickel-plated brass and will not rust. Boldtbags are proudly made in Humboldt County in Northern California and come with a 2 year complete factory warranty. Boldtbags 5, 20 and 32 gallon kits come with a pressing filter.