The Vintage Simplex SX Rear Derailleur Long Cage is a classic piece of cycling equipment that is perfect for enthusiasts of vintage bikes. Made in France by the renowned brand Simplex, this derailleur is compatible with brands like Huret and Peugeot, and is designed for 5-speed bikes. The long cage derailleur is durable, made from a combination of composite, steel, and alloy materials, and weighs 11.5 oz. It includes the rear derailleur and is ideal for road bikes, racing bikes, touring bikes, and klunkers. This vintage derailleur is a must-have for cyclists looking to restore or upgrade their classic bike.