BLH20 Single Shaft Input - Single Shaft Output 1:1 & 2:1 Spiral Bevel Gearbox              BLHT20 Single Shaft Input - Double Shaft Output 1:1 & 2:1 Spiral Bevel Gearbox 

BLHI20 Bore Input - Single Shaft Output 1:1 & 2:1 Spiral Bevel Gearbox                         BLHO20 Single Shaft Input - Bore Output 1:1 & 2:1 Spiral Bevel Gearbox 

BLHB20 Bore Input - Bore Output 1:1 & 2:1 Spiral Bevel Gearbox                                    BLHM20 Single Shaft Input - Counter-Rotating Output Shafts 1:1 & 2:1 Spiral Bevel Gearbox