BN-261A/BN-261B/BN-261C/BN-261CC/BN-261L/BN-261S/BN-261N/BN-261T/BN-261TT
| Part Number | Neck Length | w/ or w/out Air |
| BN-261A | 6" | w/out air |
| BN-261B | 7" | w/out air |
| BN-261C | 8 1/4" | w/out air |
| BN-261CC | 8 1/4" | w/air |
| BN-261L | 28" | w/air |
| BN-261S | 6" | w/air |
| BN-261N | 7" | w/air |
| BN-261T | 8" | w/out air |
| BN-261TT | 8" | w/air |