G32-845 G32845 Minimally Invasive Condylar Knee Retractor 7 1/2" Blade 12mm G32-855 G32855 Minimally Invasive Superior Knee Retractor 8 3/4" Blade 31mm G32-840 G32840 Minimally Invasive Hohmann Knee Retractor Small 7 1/2" Blade 25mm G32-850 G32850 Minimally Invasive Patellar Knee Retractor 10 1/4" Blade 45mm