*PLUMBERSSTOCK EXPERT* responded:
Hi! Thank you for posting a question here on PlumbersStock about the Metal Fab 8TGSB 8" Temp/Guard 2100 Chimney Galvanized Support Band. No, it won't fit a chimney with an outside diameter of 10 inches. What you are looking for is the Metal Fab 10TGSB. If you're ready to place an order, just click on Add to Cart, enter your zip code to get a shipping cost estimate, and proceed to checkout to begin the ordering process. Thank you for choosing PlumbersStock.com as your online shopping buddy. Have a nice day!