This is a package of pre-cleaned 50 piece Ground Edge microscope blank slides and 100 piece square cover slips. Glass blank slides: 1" x 3" x 0.04" (25.4x76. 2x1mm). Glass cover slips: 0.94 x 0.94 x 0.006 inch(24x24x0.17mm). Free coverslip tweezers are provided, use the tweezers to avoid touching the coverslips with your hands. Applicable: monocular binocular trinocular microscope experimental research. Free coverslip tweezers are provided to avoid touching the coverslips with your hands.