Coverslips

here is the link to Zeiss where you can find more about selected coverslips for high resolution microscopy :

http://www.zeiss.de/4125681f004ca025/Contents-Frame/c66a2521e524c891852575a200721a7c

and here is the link to the supplier of IWAKI glass bottom dishes which also have precise selecte coverslips:

http://www.dunnlab.de/pdf/iwaki_glassbas.pdf

Please consider using them for your imaging projects since most of the objectives are designed to be use with 0.17 mm coverslips.