Features: Replacement ink cartridge ribbon designed for electronic time clock machines. Features red and black ink colors for versatile use. Provides clear printing and easy installation. Made from high-quality materials for long-lasting performance. Offers two inner diameter options (3.4 cm and 4.4 cm) to match your existing cartridge—please verify the size of your previous ribbon before ordering. Specifications: Inner Diameter: 3.4 cm (1.3 in) or 4.4 cm (1.7 in) Material: Plastic Ink Color: Red and Black Item Size: Approx. 6.3 x 6.3 cm (2.5 x 2.5 in) – 3.4 cm inner diameter Approx. 6.5 x 6.1 cm (2.6 x 2.4 in) – 4.4 cm inner diameter Item Weight: 17 g (0.6 oz) – 3.4 cm inner diameter 15 g (0.5 oz) – 4.4 cm inner diameter Package Size: 6.7 x 6.5 x 3.7 cm (2.6 x 2.5 x 1.5 in) Package Weight: 25 g (0.9 oz) – 3.4 cm inner diameter 23.4 g (0.8 oz) – 4.4 cm inner diameter Package List: 1 x Time Clock Ribbon