ECHO Blower Attachment. 99944100025 Replaced by 99944100026 Rain Gutter Kit. Compatible with ECHO models: PB-250, PB-250LN, PB-251, PB-255, PB-255LN, PB-500, PB-580, PB-610, PB-620, PB-265, PB-265LN, PB -755, PB-755S, PB-2520, ES-250 and ES-255