which magnetic holder do I have?

[BFisher244]

I bought a used 6100 with a magnet holder. the label for the agnet holder is no longer on the unit.

Is there any way I can determine which magnet holder I have? Perhaps based on size?

The glass on my tank is not very think, so if it turns out to be the magnet for thicker glass is there any risk of this crackig the glass?

 

[d4a2n0k]

You can use the bigger magnet for thinner glass. It will not crack as long as you carefully mount it.

 

[rvitko]

Without the label it is basically impossible to tell without comparing them side by side. Slowly slide the two halves together along the glass, do not snap them togther or it is possible to break the glass.