One piece self-locking construction providing consistent performance and reliability - Extra strength due to heavier weight of material used - High-quality Solutia Nylon 6/6 UL approved - Resistant to most chemical acidsRoHS compliant - Packaged in handy zip lock resealable ...One piece self-locking construction providing consistent performance and reliability - Extra strength due to heavier weight of material used - High-quality Solutia Nylon 6/6 UL approved - Resistant to most chemical acidsRoHS compliant - Packaged in handy zip lock resealable closure bags - Carbon additives for UV protection in Black Cable Ties, suitable for continuous or extended exposure