Stainless Steel Chimney Stack 38" 5.5" diameter Chimney cap with a spark arrester. Your chimney will need a cap to keep water from getting in the flu and to keep flying sparks from getting out and the pipe is excellent for air draw. THESE ARE A CUSTOM FIT AUTHENTIC PIZZA OVENS TRADITIONAL OVENS ONLY- this will most likely NOT WORK if you purchased an oven elsewhere as it has European sizing. PLEASE MAKE SURE THIS WILL FIT BEFORE YOU PURCHASE.• Durable Stainless Steel Chimney Cap and Pipe• Stainless Steel Chimney Cap measures 5.5" in diameter • Stainless Steel Chimney Pipe measures 5.5"³ wide, 38"³ long• This piece custom fits ALL of our Authentic Pizza Ovens Models• This Stainless Steel Chimney Pipe allows you to extend your chimney. The ends are male/female and join together easily and can cut them for specific lengths.