NSPA HST207B, Flex Dual Wall Heat Shrink, 1/2″ ID x 6″, Black, 25-PackCondition:* New Surplus Stock, No OEM Packaging. As Pictured. Additional Notes:* Quantity: 25 Pack* Insulation Material: Polyolefin* Adhesive-Lined: Yes* Shrink Ratio: 3:01* Insulation Color: Black* Minimum Expanded ID: 1/2″* Wire Range: 10-4 Gauge* Length: 6″* Tubing Shrink Temperature: 121C (250F)* Operating Temperature: -55C To 110C (-67F To 230F)* UL Listed/ Recognized: YesNSPA HST207B