Du-All Art & Drafting Supply

Draws 3 kinds –– heavy, medium and light. 13 sizes of heavy and medium springs: 5/16 to 1-3/8 outside isometric Dia. Lightweight springs are slightly smaller. All are open coils. Pin-point centers insure easy positioning to repeat each loop
Size 5-5/8" X 9-3/4"
MADE IN THE USA by Timely