This product is not fit for industrial and scientific use... My analysis of this product showed that the insulation sleeves are poorly made with thin and cheap materials. the worst part is that it doesn`t fit the specified wire gauge and falls apart easily. The only pro of this product is that it comes in a pack, but don't be deceived by quantity over quality. The biggest con of this product is that it doesn't perform its function wasting your money and potentially causing harm..