More about the series Series 4000...
This compact "shorty" type Barlow triples the magnification of your 1.25" eyepiece without adding a very long extension between the telescope and the eyepiece. Popular item due to it's excellent quality, value, and usefulness on nearly every model telescope sold.
Insert this into the telescope's eyepiece holder or diagonal first, then insert your eyepiece into the Barlow.
Compatible with nearly any telescope which uses 1.25" eyepieces regardless of brand and even those with limited focus range.