You will get two SHORT brand new threaded stacks as pictured for your Amal concentric 900 series carbs. Fits 932, 930, 928, 926.... These are polished aluminum alloy with screen and measure 1 3/8" long including screen. The outside flange is 2 1/2" diameter. The ID of the threads is 1 13/16" Check out our Ebay store for more British bike parts. Any questions please contact us at 661-252-1174 Enjoy!