Quote Originally Posted by sanking View Post
In addition to the width and length the thickness of the dark slide material is also important. If there is a difference of more than about 0.015" the dark slide may not insert into your holder.

Sandy King
You are absolutely right Sandy. The thickness of these darkslides is .062 inch like the ones on my original Korona holder and on the holders I am currently producing.

Thanks for pointing that out.