Hagon Nitro Twin Shocks. These are a really good looking set of high quality shocks that will improve your ride, handling and the look of your bike. Improve your rear suspension on your rear twin shock motorcycle. Available for most makes and models. Stainless Steel Body and Spring 18mm Hard Chrome Piston Rod 38mm Piston 10 click Adjustable Damping Fully Adjustable Spring Preload Hi-Tech Shim Stack System for Improved Damping Spring: 73mm Outside Diameter Rebuildable Adjustment tools supplied Range of Lengths available to fit most twin shock Harleys FXR, FXD, Sportsters also Triumphs, Nortons, Ducati Moto Guzzi, Twin Shock Jap bikes etc. These shocks can be custom built to your requirements at no extra cost, ie heavier lighter spring longer or shorter length. Please advise, your bike make & model also what weight carried ie mainly 2 up, luggage, Sport, tour. what length and i will advise if available. Lengths 290, 300, 310, 320, 330, 340, 350, 360, 370mm.