RS 3 Sport oil-pneumatic shock absorber Each shock absorber has been designed for a specific scooter or moped with regard to both size and operation. This shock absorber features: excellent operation very long life thanks to the use of high-quality materials extremely low coefficient of friction Technical data Type: oil-pneumatic Use: road Shock absorber rod d. 12mm in C48 steel-hardened and tempered Piston in steel and sintered bronze New laminar system in Swedish steel LUBRIFLON-PTFE B70 piston guide shoe (bronze-loaded modified compound) Sliding on DU GUIDE bush (compound obtained by sinterization of a layer of spheroidal bronze on a strap of suitably shaped low-carbon steel with subsequent impregnation and coating with a PTFE + FB mixture) SEALTHANE 9345 grade polyester resin scraper ring Micrometric regulation of spring preloading by means of ring nuts Special low-viscosity oil, pratically unaffected by temperature changes Code Inter-axis  M4614616