Size information: each rubber residue eraser is approximately 2.8 x 2 x 0.32 inches or 7 x 5 x 0.8 cm; art ruling pens are approximately 4.7 inches (12 cm), 4.9 inches (12.5 cm), and 5.25 inches (13.3 cm) in length, offering different sizes to meet various needs. Functional: the adhesive removal eraser effectively removes adhesives and residues from paper, plastic, and other surfaces, making it practical for school, home, and office use. It helps clean marks from watercolor, sketches, glass, plastic, leather, and boards. Ruling pens are traditionally designed tools for creating precise lines using ink, paint, or other liquid mediums with suitable viscosity. Durable material: the artist masking fluid pen features a hardened plated steel nib and a green plastic handle, suitable for drawing with paint, ink, or masking fluid. The residue eraser is made of rubber, which is safe, durable, elastic, and resistant to breaking under pressure. Convenient to use: these ruling ink pens allow easy adjustment of line width. Adhesive residue erasers help remove adhesive residue quickly and efficiently. Color: yellow Material: metal and rubber Package Contents: 3 x glue residue erasers, 3 x art ruling pens Note: Light and display settings may cause slight color variations between the image and the actual item. Measurement allows an error of +/- 1-3 cm.