We have the 12' ' gin saw as follows: mm inch Outer * Bore * Thickness Outer * Bore * Thickness 305* 61.9* 0.92mm 12" * 2-7/ 16" * 0.036" 305* 61.9* 0.94mm 12" * 2-7/ 16" * 0.037" 305* 61.9* 0.96mm 12" * 2-7/ 16" * 0.038" 305* 61.9* 1.15mm 12" * 2-7/ 16" * 0.045" 2.Tooth number 282/ 264 3.Use for Cotton Machinery Lummus 80 88 90 Murray 80 90 Continental 80 90 Hardwicke-Etter 80 90 100 120 177-178Dual. 1.spec. mm inch Outer * Bore * Thickness Outer * Bore * Thickness 305* 87.5* 0.92mm 12" * 3-7/ 16" * 0.036" 305* 87.5* 0.96mm 12" * 3-7/ 16" * 0.038" 305* 87.5* 1.15mm 12" * 3-7/ 16" * 0.045" 2.tooth number 282/ 264 3.Used for Cotton Machinery Lummus 128 158 Murray 120 Hardwicke-Etter 224-254 Dual. 1.spec. mm inch Outer * Bore * Thickness Outer * Bore * Thickness 305* 100* 0.94mm 12" * 3-15/ 16" * 0.037" 2.Tooth number 282/ 264 3.Used for Continental 120 1.spec. mm inch Outer * Bore * Thickness Outer * Bore * Thickness 305* 120* 0.92mm 12" * 4-3/ 4" * 0.036" 305* 120* 1.15mm 12" * 4-3/ 4" * 0.045" 2.Tooth number 282/ 264 3.used for Lummus 108 158 Consolidated 164 198