Specification- Colour: Blue - Number: 50pcs - Length per piece: 15mm - Diameter (before shrinking): 7 mm - Diameter (after shrinking): 1.75 mm - Shrink factor: 4: 1 DescriptionAs with the famous MDPC-X Sleeving, the MDPC heatshrink quality is globally regarded as the best-in-class, since MDPC started in 2007. Instead of beginning to talk about all kind of technical data, test results and specifications, here is what users typically told us about our heatshrinks: \"Hello MDPC, I just wanted to tell you that I have used so many different heatshrinks in my professional career, but yours top them all in every aspect.\" MDPC just offers what can\'t be exceeded in quality; otherwise we would not offer it. While most manufacturers of heatshrinks went the cost-saving route in the last years and the available quality degraded, our quality stayed the same. What makes a good heatshrink for us?First of all we like ultra-thin walls. It just looks awesome and you can easily over-expand it in order to extend its original diameter even more. MDPC offers the thinnest walls in relation to its corresponding shrink-ratio. We love a high shrink-ratio, so one heatshrink-size can be used in many situations easily and effectively. \"1:1\" would mean that it does not shrink at all. \"2:1\" means that it shrinks down to 1/2 of its original diameter. \"3:1\" means that it shrinks to 1/3, \"4:1\" means that it shrinks down to an amazing 1/4. MDPC offers unusual shrink-rates, which make your work as easy as possible. Absolutely smooth surfaces with a matte appearance is not a very common combination, but MDPC gives this to you. While being ultra-thin, it is important that the heatshrink does not burn so quickly. With this property, it is easy to melt MDPC Sleeve underneath the shrink by applying temperatures of more than 250C. The very thin walls help you to see when the sleeve melts. You recognize it as soon as the footprint of the sleeving edge underneath the heatshrink turns into a smooth transition. Different colours are very important, so people can color-code their cables and of course support their designs in a beautiful way. To sum up what MDPC-X heatshrink stands for: Only the best in heatshrink-technology and design is good enough for us. If something could be done better, we have already done it. How to use heatshrink in combination with MDPC-X sleeveYou either need a heatgun or lighter to shrink the heatshrink. A hair-dryer is not enough to shrink to the minimum diameter. For colored heatshrinks, we recommend to only use a heatgun. Using a lighter, the best technique is as follows: Only use the lower portion of the flame (the flame should be at least 3 cm long) and move it into the heatshrink and out of it again and again, while twisting the cable & heatshrink from time to time, so you heat it up at different sides. Let the heatshrink completely cool down, before you apply any length-stretching-force onto the MDPC-X Sleeve. Once the heatshrink is cooled down, it turns hard and holds the sleeve in position. If you want to move a cable-end into a connector (i. e. ATX wire into ATX connector), you can heat up the front of the heatshrink, so it gets soft again and adjusts perfectly to the inner shape of a connector. Learn more about using our heatshrink for \"melting\" techniques in the previous section.