This collimation eyepiece is made by Orion and is in mint condition.
It is the Cheshire variety and will work with any reflector type telescopes and many Cartadioptric designs. Retails for $35. Im selling for $16 + $4 shipping. I have much good feedback from a well know internet auction site and will furnish this info on request.
SALE Pending. Thanks Astromart and all who inquired!