• High-quality polymer material with reliable electrical insulation and heat resistance. • 3:1 shrinkage ratio that adjusts to one third of its original diameter. • Kit of 400 tubes 45 mm long in 7 different diameters. • Included diameter range from 2,4 mm to 19,1 mm. • Equipped with internal hot-melt adhesive for a hermetic and durable seal. • Versatile moisture protection for electronic, automotive, and DIY projects. • Black finish for a professional and discreet appearance.