Genuine machine research power sheep cnc oblique bottle damping adjustable rear shock absorber Single 2750 double gun 5500 double gun subscript 2 Damping adjustable, spring preload adjustable, color red orange titanium black purple (upper and lower barrel is titanium) Length 290mm, 320mm, 340mm, 360mm Spring pounds have 50,60,70,85,100,120,140,160 pounds of multiple methods Cnc upper and lower, hair texture upper seat processing, oblique bottle 45 degrees Installlation pay for shop May send abroad by different means Our other wired customer service Online auction credit card installlment charge 18+free inform family installlments welcome to consult