Body in Anti-friction trested steel, 14mm diameter rod with low friction bushes, and head in Ergal worked from a single block by CNC machine. Setting adjuster: - spring preload with micrometric single aluminium ring - rebound (range 7 clicks) Available for some models (Custom/Naked) the ‘lowered’ versions "41", shorter than original, and the "higher" versions “61”, longer than original (contact your local dealer for the information on the version available) N.B: The product shown in the photo is generic for XZE/IZE/CZE. Some characteristics (example: attachments) can differ depending on the model application. Compatible with: - Aprilia: RST 1000 Futura_M, SL 1000 Falco_M