Busch Radial fan RA0160D, RA0165D, RA0202D, RA0205D, RA0250D, RA0255D, RA0302D, RA0305D. P/N 0525.513.155 (0525513155, 0525-513-155, 525513155, 0525 513 155). Pos. 321 in spare parts catalog