The Glass Extension Tube will help the performance of your SR500 and SR700 (as well as the SR300/340) coffee roasters and allows for a larger batch size - up to 7 oz! With two silicone rings that help prevent air loss, you'll be amazed by the improved bean agitation. The glass tube helps bean movement during the entire roast. Machine will be very top heavy so be careful - the glass components can break easily. Click Here for installation sheet
Please note: the extension tube does not work with the SR540 roaster!