Package includes 6 pieces 3 inch hose clips, fits diameter from 59mm to 82mm (2.3-3.5 inch) Design: Can lock the hose very tightly, leak-proof and ensure durable locking construction clamps Material: Made of 304 stainless steel, corrosion-resistant, will not rust for long-term use Easy to use: Use a screwdriver to loosen or tighten the screw of the hose clamps, then adjust the size, secures the ducts firmly in place (Note: Screwdriver is not included) Application: The 3 inch hose clamps are used to secure ducts, dryer vents, pipes, hoses, cables, tubes, fuel lines in automotive, industrial, mechanical, agricultural, boat/marine, shield, household, etc.