Need Advice Buying a Tea Ball/Infuser for Dry Hopping

[ultravista]

I need some advice on a good tea ball/infuser for dry hopping with pellets in a serving keg. There's a bunch out there - I don't want pellet particles in my beer ...

 

[Crayfish]

Be careful not to but the 4.5" ones on Amazon. They are great for secondaries in buckets. However, they are too wide to fit into Cornys.