Replacement Head Valves For Bostitch # 180450-S Type: Head Valve. Replaces for 180450-S, 180450S. Fits for DeWALT: DWFP12232, DWFP12231. Suitable for BT1855, SB-2IN1, SX1838, SB-1850BN, SB-1842BN, SB-150SX, SL1838BC, BT1855K, SX1838K, EHF1838K, LHF2025K, BTFP12233, SB-100SX, BN200C, NS150C, BN200S. Every Product from HASME will enjoy 30 days Money-back and 18-Months worry-free warranty. If you're not sure whether it fits your model, please email us-includes your Models and serial number. Note - This is an aftermarket replacement Parts. Any brand name is used solely for the purpose of demonstrating compatibility.