We make Laser Concentric Circles with 3 colors of lasers, and with 10 Circles. Check the following pictures for the product details.
Other suppliers for Laser Concentric Circles .
Red Laser Concentric Circles
Starlight Instruments, LLC Red Laser Concentric Circles, Holographic Attachment with Concentric Circle pattern for HOLOGRAPHIC COLLIMATOR
Agena AstroProducts , Howie Glatter Holographic Attachment for Laser Collimator – Concentric Circle Pattern