Heathrow Scientific HD159872A Cut Edge Premium Microscope Slide with 90 Degree Corner, 3" Length x 1" Width, 1-1.2mm Thick (Pack of 50) 1 x 3" glass microscope slide for microscopic examination applications 1.0 to 1.2mm slide thickness Beveled edges for safe handling Washed, rinsed, and dried dust-free for immediate use Wrapped in cellophane to seal out moisture