This BG official replacement cap is designed to fit over their leather style one screw ligatures including the Standard, Revelation and Super Revelation range.
Made of plastic the cap is designed to be wide enough to fit the following official BG ligatures:
AL12, AL12RJ, AL12RSJ, AL12RS and AL12SR.
Official BG Product replacement Cap for most Alto Sax BG Ligatures (leather style)
Made in France
Using a mouthpiece cap helps protect your reed and mouthpiece tip from damage when not in use
Is not suitable for use on non BG ligatures