HD2660D ----------- Tube Size: 7" x 5.5" -------- 1 DZ / 4 DZ / 6.8'

 

HD2660B ----------- Tube Size: 7" x 5.5" -------- 1 DZ / 4 DZ / 6.8'

 

HD2660C ----------- Tube Size: 4" x 5.5" -------- 1 DZ / 4 DZ / 6.8'

 

HD2660A ----------- Tube Size: 7" x 5.5" -------- 1 DZ / 4 DZ / 6.8'