Kadee #817 O Scale Plastic Gearboxes - Black

Kadee #817 O Scale Plastic Gearboxes - Black   O Scale Plastic Gearboxes & Lids - BlackO Scale Precision Engineered Plastic Gearboxes & LidsFor All O-Scale Medium & Long Shank Couplers.(#740, #742, #745, #746, #747, #804, #805, & #816)