Counting Chamber Howrd Mld Gls ,Each

Details:

Howard mold counting chamber, glass^ center of slide has 15x20mm rectangle flanked by 0.1Mm high shoulders on each side. Rectangle and cover glass have optically plane surfaces. Rectangle has 2 engraved parallel lines spaced 1.382Mm apart. With thin (28x33x0.5Mm) and thick (28x33x1.0Mm) cover slips.