Progressive Suspension Fork Spring Kit Standard Duty 49mm Upside Down Softail 18-21 2OM Brackets are aluminum with a

Brackets are aluminum with a polished finish

it can safely blend with all other automotive lubricants

Fits models with handlebar mounted speedos

Takes a 83-up screw type gas cap and a 22mm threaded petcock

Progressive Suspension Fork Spring Kit Standard Duty 49mm Upside Down Softail 18-21 2OM Brackets are aluminum with aFor upside down forks. Progressive rate fork springs of superior quality. Precision wound and made of high quality chrome silicon wire. Provides a smooth ride but the progressive rate helps prevent bottoming out when taking big bumps. Each kit comes with progressive fork springs and necessary spacers. Fits: 18 21 FXFB S Fat Bob, FLSB Sport Glide 20 21 FXLRS Low Rider S (upside down forks)