NEW BOSTON GEAR 239D-20 GEAR SPEED REDUCER 239D20 BLDG. The item "NEW BOSTON GEAR 239D-20 GEAR SPEED REDUCER 239D20" is in sale since Saturday, December 13, 2014. This item is in the category "Business & Industrial\Automation, Motors & Drives\Control Systems & PLCs\PLC Processors". The seller is "dwsjps" and is located in MICHIGAN. This item can be shipped worldwide.