ShrinKit 321-A Basic Heat-shrink Tubing Kit ShrinKit 321 is a family of five heat shrink tubing assortments in attractive and handy assembly kits. The range consists of ShrinKit 321 Universal, ShrinKit 321 Universal Basic, ShrinKit 321 Basic, ShrinKit 321-A (a dual wall tubing) and ShrinKit 321-A Basic. With their ideal shrink ratio of 3:1, these products replace many differently sized tubing solutions by fitting almost any heat shrink requirements. Choosing the required product is simple, the tubings are identified by size, length and content printed on every compartment of the assortment boxes. Features and Benefits • Adhesive lined • Black and transparent • Reusable case with size changeable compartments • Self-extinguishing (except for transparent) • Operating temperature: -55 °C to +110 °C Product Application Information • Electronics industry • Electrical installation The black tubing is used for environmental sealing of splices and connectors. The transparent tubing is typically used for protection of cable markers. ShrinKit 321-A tubing seals against moisture and dust and with the ideal shrink ratio of 3:1 protects a wide variety of electrical applications.