These heavy duty stainless steel Tall Boy Kettles are proportioned to the optimal height to diameter ratio of 1.2. Brewing science indicates that this is the ultimate ratio for home brewing. A full wort boil is an easy way to improve any extract batch and it is essential when moving to all-grain. Improve your hop utilization, reduce kettle caramelization, and sanitize all of your wort in the boil.This is a serious brew kettle at a price you won't want to pass up. Please note: This item does not qualify for flat rate shipping.