Manufactured and printed in the USA, this 4 Gauge 3:1 Heat Shrink tubing with DS18 Logo fits 4 AWG & 6 AWG wires and comes in Red and Black. This 20 Pack listing contains: (10) DS18 Logo Red 4 Gauge Heat Shrinks and (10) DS18 Logo Black 4 Gauge Heat Shrinks. Presenting our 2 Heat Shrink Tubing, the perfect option for any serious car enthusiast. Compatible with 4 AWG and 6 AWG wire sizes Features a 3:1 shrink ratio, reducing to one-third of its original diameter Rated for a maximum continuous operating temperature of 135°C Activates at 100°C and functions within an operating range of -55°C to +135°C Ideal uses encompass insulation, wire identification, bundling, mechanical protection, color coding, lightweight harnessing, component physical/electrical protection, strain relief, and solder insulation UPC 659459062079 ASIN B0FMQBSFVL Brand Name Big Jeff Audio Material Type Polyvinyl Chloride (PVC) Number of Items 20 Manufacturer Part Number 659459062079 Global Trade Identification Number 00659459062079