Boot

Color code connections.
Boots strain relief allows a large bend radius, necessary to achieve cat 5 performance on level 5 connections.
Different inside diameters for different cable O.D.
Available in Beige (BG), Black (BK), Blue (BL), Green (GN), Gray (GR), Orange (OR), Red (RD), Yellow (YW), and White (WH).
PTC-RJ45-55(CC), where CC is color.