A4D500-AD03-09 - oboslete alternative is A4D500AM0301 D4E250CA0101 W4D450CG0180 KAE146-AB73-17 alternative is K4E146AB7321 K3G280-RR03-M3 07/16 30KFB4004 8668734 550123 5302471 HELICE D300MM obsolete replaced by M4Q045.EA01.G3 550163 HELICE D300MM ( brand EBMpapst) M4Q045EA0152 W4D630-GH01-01 W2E200HK3801 D4E180CA0202 R2D220AA24-17 VEYA R2D220AA24-14 W4D450 OH05-06 - OBSOLETE SIMILAR MODEL W4D450CG0180 M4Q045-EA01-75 M4Q045EA0101 R2D225-AV02-18 OEM!! W2D160-EB22-18 - alternative A2D160-AB22-06