... quality 2) Reasonable prices 3) Inner Diameter(mm):1 / 1.5/ 2/ 2.5/ 3/ 3.5/ 4/ 5/ 6/ ... . 2,500 Volts Min. Indiv.Grade C-1 2,500 volts Min. Avg. 1,500 Volts Min. Indiv.ADVANTAGESAcrylic-F Sleeving is ... both sealed and unsealed systems.AVAILABLE SIZE Inner Diameter(mm) 1, 1.5, 2, 2.5, 3, 3.5, 4, 5, 6 ...