Provide your classroom or group project with a variety of graphite sticks. Solid, extra smooth graphite sticks are ideal for drawing, sketching, backgrounds and shading, plus duplicating textures with rubbings. Set contains 24 each of square and rectangular sticks in 2B, 4B and 6B. Square sticks measure 2-7/8 x 1/4 x 1/4". Rectangular sticks measure 3 x 1/2 x 1/4". PMA approved, conforms to ASTM D4236.