PTP 000550 15" Stainless Steel Locking Ties - Pack of 8 - Zip Ties / Thermal Ties (Use up to 4" Diameter Pipe) 304 Stainless Steel. 150 pound Tensile Strength Can withstand Harsh Conditions and Extreme Temperatures Resists Gasoline and Engine Chemicals Unique Ball Locking Mechanism 8 Pack of 15in Ties. Use up to 4in Diameter Piping