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Retraction ratio for these heat shrink tube is 2: 1 ,it will shrinkto 1/2 of its diameter supplied. Five different colors of heat shrinkable tubes (yellow, blue, black, green, red) are available for easy classification and meet the needs of different scenarios. Multiple environmental protection grade certificates, fast shrinkage, flame retardant, flexible, safe and reliable. To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.







