This is a legacy product. Please contact us for the latest version.sales@ocaire.com, CYL, AIR, DBL ACTING, DUAL STK, ACTUATOR, CG/CG3 ROUND BODY CYLINDER, HD, 20MM CG DOUBLE-ACTING, .53519 lb, SeriesDescriptionModelActionNoteVol. no. (for std model)CG1Air cylinderCG1Double acting, Single rodExcept with rubber bumper666