Altair 60mm Straight Through Finder / Guide Scope with an indexed non-rotating, helical micro-focuser. 
A 23mm illuminated reticule eyepiece is included with a variable brightness illuminator unit.
Focal length is 225mm (F3.75) and the magnification with a 23mm eyepiece is 10x.
The focuser has a 1.25" ID push-fit adapter with brass compression ring, allowing use of 1.25"  eyepieces or auto-guiding
cameras.
The indexed micro-focuser can be locked, enabling the eyepiece or camera to set at the correct focus-point, making it a good choice for autoguiding with small / medium refractors. 
Because the focuser does not rotate, the eyepiece reticule or guide camera is easier to focus and maintain alignment on-target.
The rear of the focuser also includes a T2 thread to allow the addition of extensions.

The finder stalk is compatible with most finder scope brackets on the market, but also includes a universal finder bracket (product code UNIFBR) with a cross-slotted hole pattern to fit most telescopes.
 
Included in the box: 

• 60mm finder scope optical tube with dewshield and rubber end cap.
• Metal Rings with Nylon Tipped Thumbscrews
• Metal Finder Stalk (fiits Skywatcher, Altair and most finder brackets)
• Universal Finder Bracket (two thumbscrews)
• 1.25" Non-Rotating Helical Focuser (focusing scale, locking thumbscrew & brass compression ring, end cap)
• 23mm Illuminated Reticule Eyepiece (laser etched reticule)
• Eyepiece illuminator unit (variable brightness control)