Product Name : Drawing Compasses ;Main Color : yellow Material : Hard Plastic;Maximum Circle Radius : 70cm/ 27.6" Compasses Size(Unfolded) : 80 x 4 x 2cm/31" x 1.6" x 0.8"(L x W x T);Copasses Size(Folded) : 44 x 4 x 2cm / 17.3' x 1.6" x 0.8"(L x W x H) Rubber Dia : 3.5cm /1.4";Weight : 130g Hard plastic pencil compasses with mechanical pencil lead, used for drawing circle or circular arc. Black rubber suction cup can steady at blackboard. Geometry tools, especial suitable for teacher teaching use. Package Content : 1 x Drawing Passes Note:Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.