UL2159 Band-It Ultra-Lok Preformed Clamp - 201SS 1/4 hard - 3/4" x .030", 5" diameter - 25 Pieces/Box 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.