The 51101 is a Microscopic slide that measures in at 26x76 mm and comes with a cut edge Menzel. The 51103 Microscopic slide measures in at 26x76mm and features a ground edge Menzel. The 51107 Microscopic slide measures 26x76 mm and features a sandblasted and cut edge band Menzel. The 51108 Microscopic slide measures 26x76 mm and features sandblasted band and a ground edge Menzel.