Doesn't fit Echo CS-3450 chainsaw. You're better off getting the entire valve.
These were supposed to fit ALL Echo 2-cycle engine equipment, regardless of model or age. But they don't fit Echo CS-3450 chainsaws. (I didn't try them on newer Echo tools though.) The problem with them, is that they are too big outside diameter, to fit into the mounting hole.
They appear well-made, and the price was good. but they also are made of slightly more rigid / less flexible plastic, than the OEM part that came from the factory on the tool.
I tried to return them, But the small time limit return window expired while I was away on a job. So I got stuck with $6 worth of useless garbage. ...at least it wasn't a big waste. I've probably wasted more time writing this review...
Verified purchase: YesCondition: New