Microscope slides: 1.7101 Ground Edges 2.7102 Unground Edges 3.7103 Single Concave,Ground Edges 4.7104 Dound Concave , Ground Edg 5.7105 Frosted One End On Side,Ground Edges 6?7105-1 Frosted One End On Side,Unground Edges 7?7106 Frosted Both Ends OnSide,Ground Edges 8?7107 Frosted One Ends On One Both Side,Ground Edges 9?7107-1 Frosted One Ends On Both Side,Unground Edges 10?7108 Frosted Both Ends On Both Side 11?7109 Colour Frosted,Ground Edges 12?7110 Frosted On One Side 13?7111 Frosted On Both Side COVER GLASS: 1) 18 x 18mm 2) 20 x 20mm 3) 22 x 22mm 4) 24 x 24mm 5) 24x32mm 6) 24x40mm 7) 24x50mm 8) 24x60mm We are maufacturing Microscope slide and cover glass ,we can offer you better price and more professional service, Should you be interested in our products, pls do not hesitate to contact with us. Tks in advance