I have a Helix laser collimator with the grid pattern hologram. An excellent tool, you can find the details of this item on the Helix webpage (connect from the AstroMart home page). Great shape except for some scratches on the barrel due to the tight fit of the collimator into a precision 1.25" adapter (not included). I also have the instruction booklet. New cost is $65 for the collimator plus $30 for the hologram plus $8 shipping for a total of $103. I will sell for $70 including shipping in CONUS.