Feature●Compatible with Echo Backpack Blower PB-770 PB-770H PB-770T●Replaces OEM# A411001521 C11454●Easier to install on the engine and stable operation●90 days warranty protects you after your purchase.If you have a problem, we will take every measure to assist you, contact us for a replacement●Please carefully confirm our pictures with your original parts number before purchasing, make sure they can be applied to your machineDescription