Yep. .065 is very common. You could use smaller line also if you wanted.

Use any brand line you want to, it's all about the same. I'm using .080 but I want to drop down to the .065 for my little SST25, it has the 2 holder notches for .065 and .080. You just have to try out some and see what you like. There's fancy multi-edged lines and stuff like that you can try out.

Hello!
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The trimmer comes with 0.065" line and I am just wondering if I can use 0.08" line cause I heard it lasts longer. In the manual though, it says use thicker line may burn the motor. I am just wondering if anybody tried this before.

What kind of weedeater do you have?

I have a craftsman 12" electric line trimmer.