Avo produce a comprehensive range of competition twin tube coilover dampers, suitable for kit cars, competition race, sprint and hill climb cars. CNC machined one piece damper body Solid one piece top/bottom mounting loops 1/2" Chromed piston rodRange Options:Adjustability: Single adjustable. Bump and rebound are made simultaneously via a single control knob. Double adjustable. Bump and rebound are separately adjustable and feature control knob for each. Double adjustable dampers allow for finer tuning of the damper control for improved handling.Body Diameter: Dampers with a body diameter of 1.625" accept springs with a 1.9" internal diameter. Dampers with a body diameter of 2" accept springs with a 2.25" internal diameter.Mount Type: Poly bushes allow for some flex and isolate vibrations, ideal for road applications. Spherical bearings eliminate any play but do not isolate vibrations so are more suitable for competition use.Length Open-Closed: This is the length of the damper measured