Elastinol Spring This spring delivers constant, unvarying force for predictable results –even when the spring compression is changed, the force stays the same! Gentle long-term action eliminates soft tissue trauma. Springs expand and compress further without losing working force. Easy to use! Simply measure, cut, place on the archwire and ligate. Three forces to choose from—50, 100 and 150 grams. • .030” inside diameter fits wire up to .017” x .025” • .045” inside diameter fits over any size archwire"