Blackboard set square, 30-60-90 and 45-45-90 ongest side 60cm, min. 4.5mm thick plastic,graduated in cm on all sides with detachable handle. 

Maths Teaching Kits School Lab Equipment Suppliers in India

Ltekonline are the manufacturers of Square Sets Maths Teaching Kit used to demonstrate engineering principles in Engineering Colleges, Engineering Schools and Maths Teaching Kits for Engineering Teaching Lab in Universities