*PLUMBERSSTOCK EXPERT* responded:
Good day! Thank you for posting your question on PlumbersStock.com about the Oatey 38697 Gas Valve Outlet Box. The width of the box is 6 inches, according to page 2 of this Specification Sheet. About your other question, yes, we have a wider one, the Oatey 38957 Washing Machine Outlet Box. Its width is 8-3/4 inches. Here's the Specification Sheet. See page 2 for further information. If you're interested in purchasing this outlet box, just hit the "Add to Cart" button, enter your zip code and you're all set. Thank you and we are happy to serve you here at PlumbersStock.com.