8.701-452.0 Orifice M-Reg #4.0/D-Reg #4.5 ships factory direct right to your door. ADDITIONAL PRODUCT NOTES: Interchangeable Orifice for Nozzle, #4.5 8.701-452.0 nozzle size nozzle size - 4.5, oem - a+, 084027, 87014520,