*PLUMBERSSTOCK EXPERT* responded:
Hi! We are glad that you're interested in our 6-inch countersunk brass flush plug. With regards to your question, we don't have it in 8.5 inches. The largest size that we have is 6 inches. Here is a list of countersunk brass flush plugs that we have. If you want to purchase a product, feel free to click Add to Cart, enter your zip code and you're good to go. Thank you for visiting PlumbersStock.com!