G32-845 G32845 Minimally Invasive Knee Retractor Length 8" Blade Width 36mm G32-855 G32855 Minimally Invasive Knee Retractor Length 8.75" Blade Width 36mm G32-840 G32840 Minimally Invasive Knee Retractor Length 7.5" Blade Width 25mm G32-850 G32850 Minimally Invasive Knee Retractor Length 10.25" Blade Width 45mm