CELLTREAT Scientific Products 20mm Round Cover Glass. High-quality, optically clear borosilicate glass cover slips are ideal for specialty microscopy and imaging. Ideal for use with dishes and multiple well plates and anywhere a square cover glass is unsuitable. Consistent flatness and scratch-free. Resistant to organic solvents. 20mm Round Cover Glass can be used with a 12 well plate or 30mm glass bottom dish (Part No. 229632). Cover Glass is #1.5 thickness. RNase/DNase free and non-pyrogenic. Every case is printed with the lot number for quality traceability. Packaged in a hinged plastic storage case, sterile, 100/case.