A great way to get into all grain brewing! We have made mashing easy by converting a Rubbermaid cooler into an amazing, temperature retaining, mash tun. You'll notice barely any temperature loss throughout your 1hr+ mash. This unit arrives completely assembled. We use the highest quality components - Rubbermaid coolers which are higher quality than Igloo or imported versions from China, all stainless steel hardware and FDA approved silicone tubing that is heat resistant to 500 degrees.