Bostitch OEM Driver Unit part# G0205600-K. Compatible with: BN200SB Type 1, BN200SB Type 17179001, BTFP1850K Type 0, CMPBN18SB Type 0, FMFP71928 Type 0, SB-1850BN Type 0, SB-1850BN Type 1, SB-1850BN Type 14065000 and Higher, SB-1850BN Type 17179001, SB1850BN Type 0, SB1850BN Type 1, SWK1850BN Type 0