You are looking at a set of 2 Brand New paper air filters and offset assemblies as pictured for Amal 30mm, 930/301 or 28mm. application which came on many British makes from early 60s, to early 70s. Triumph part number 82-5334, or F5334, and many other part numbers. This measures 1 11/16" deep, 4 7/8" diameter. The mounting hole will thread onto a 1 13/16" carb, or the threaded insert can be removed to fit 1 7/8" carb intake such as the Amal alternative Keihin PWK carbs we have in our ebay store. Check out our Ebay store for more Brit bike parts. Any questions contact us at 661-252-1174 or . Enjoy!