MARTIN WORM GEAR WHEEL 12 PITCH 20 TEETH 20:1 RATIO SINGLE LEAD 1/2” BORE
12 PITCH 20 TEETH SINGLE LEAD 20:1 RATIO. HEAVY DUTY LARGE 12 PITCH TEETH !
12 PITCH 20 TEETH SINGLE LEAD 20:1 RATIO. HEAVY DUTY LARGE 12 PITCH TEETH !