Thin-walled: flexible, light, space-saving. 3:1 covers a larger application area, increased contact pressure. Good fire protection properties. Shrink tubing set in a practical case. Contains 5 sizes - from 1.5 mm to 18 mm inner diameter. A total of 220 shrink tubing sections. The ShrinkKit 321 Basic is a high-quality shrink tubing range with a large number of shrink tubing sections and covers a wide range of applications thanks to its variety.