Inside B.O.P. Dart Valve Parts List
| Connection Size | 2 7/8" | 2 7/8" | 3 1/2" | 3 1/2" | 4 1/2" | 4 1/2" |
| Dart | 2875D | 2875D15 | 350D | 350D15 | 450D | 450D15 |
| Dart Seal Ring | 2875DS | 2875DS | 350DS | 350DS | 450DS | 450DS |
| Seat | 2875S | 2875S15 | 350S | 350S15 | 450S | 450S15 |
| Spring | 2875SP | 2875SP | 350SP | 350SP | 450SP | 450SP |
| Push Rod | 2875PR | 2875PR | 350PR | 350PR | 450PR | 450PR |
| Lock Screw | 2875LS | 2875LS | 350LS | 350LS | 450LS | 450LS |
| Major Kit | 2875MK | 2875MK15 | 350MK | 350MK15 | 450MK | 450MK15 |