For sale is a secondhand acquisition of mine - an Orion Explorer II 7-21mm zoom eyepiece. Found the zoom is a little stiff and used minimally - was during a phase where I got excited about buying eyepieces in many sizes (which admittedly has been useful to figure things out myself for best ft with my scopes). Works ok otherwise. Optics seem fine. Includes box and end caps. The end cap for the top I do not believe is original as it is a loose fit.