Features1Steel Plate: Adopts high tension steel plate with nickel chromium plating and multi layer electroplating anti rust treatment, able to ensure a long term use. 2High Accuracy: High accuracy gear ratio makes gear shifting more fluent, also uses punching design to reduce weight, improving your using experience. 3Hollow Design: Hollow technology can easily reduce the dead weight, making riding lighter and smoother, will not increase your burden or cause additional energy waste. 4Detail Description: Cassette cogs is 111315171921242834T, and is 9 speed type. Has strong compatibility for mountain bikes. 5Smooth Running: Has fluent rotation without much noise, having close connection with the bike hub, stable running for your satisfying feelings.SpecificationItem Type: Bicycle FreewheelMaterial: NickelChromeSteelColor: As Picture ShownApplication: For Mountain BikeGross Weight: Approx.418g/14.7ozSpeed Ratio: 9 Speed, 11-13-15-17-19-21-24-28-34TPackage List1 x Freewheel2 xSprockets1 x Deadlock Cover