SunTour Cyclone Mk-ll GT RD-3700 Road Rear Derailleur – 2/3×5/6/7-Speed-NIB+
Back in this era, you rode Suntour before Shimano. New In Box. 5/6/7-speed friction shifting. Rare long arm for a double or triple crank and will take a 34T cog. Only 171 grams/6.0oz.