Graves Vaginal Specula 500-KNT-100....Replacement Knurled Nut Pkg/12ea for 500-100, 05, 110 Back to Products     Catalogue #       600-100   Small blade: ¾" x 3¼" (20mm x 83mm) 600-105   Medium blade: 1â…œ" x 4â…œ" (35mm x 110mm) 600-110   Large blade: 1½" x 5" (37mm x 126mm)