I got this to centre spot a Skywatcher 130M which has no factory fitted spot. It works brilliantly and reflects clearly. Makes using collimating cap easy. Made my own template from a laser printed laminating pouch. The spot is Very sticky so take care to get it carefully centred without catching the mirror or it will stick and is then tricky to reposition. Great product. Quick delivery as usual from FLO.

This is a must when collimating with the Catseye system, the sticker is easily mounted on the mirror with the template, and the sticker is very reflective so it is very easy to collimate with this.
I made a short video of how to mount the sticker, it can be found here: https://youtu.be/qgYr23RB4ME

/ Daniel, Exo Photography

Love my highly reflective white triangle centre spot.