UL2109 Band-It Ultra-Lok Preformed Clamp - 201SS 1/4 hard - 3/4" x .030", 2-3/4" diameter - Band-It® - Ultra-Lok Preformed Clamp - 201 Stainless Steel 1/4 Hard; Unique lock formed under full tension maximizing tightness. Lock is thicker and 2-3 times stronger than other preformed clamps. Smooth ID design reduces leak paths. Lock hood protects lock from snags. Double wrapped for additional strength.