The Baader Q-Turret Barlow lens is specifically designed for the Baader Classic ortho eyepieces, but of course it can also be used with other eyepieces. On its own, it gives a 2.25x focal lengthening, but it is possible to extend the lens element and place it on the filter thread of another eyepiece - then you get a focal lengthening of 1.3x.
The Barlow lens is characterised by the high optical quality you expect from Baader, with multiple layers of excellent anti-reflection coatings, black-painted lens edges and internal anti-reflection solutions for excellent image contrast.
Fits in a 1.25" focuser.
