Omni High Power Set
This is a wide combination including a 2x Barlow lens, eyepiece 6mm and 9mm, but for mostly planetary close-up views.
They are compatible with any 1.25″ version focuser or diagonal.
Magnifications are undoubtedly necessary in visual observations. Use them in a smarter way is very helpful.
You may not need the highest magnification in order to get the best view. You always have to be a good observer or judge that whether the targetted object's brightness, the turbulences or seeing are stable.
At anytime you can swap or change the combination of eyepiece magnification for various conditions.
The Omni 2x Barlow lens can be stacked with any other 1.25" eyepieces.
Try out different combined powers, you'll get to see the results that you would expect.