You searched for "preinsulated"
MECATRACTION
MECATRACTION Tin Plated Copper White Cable Sleeve, 9.2mm Diameter, Preinsulated Closed-End Wire Connectors Series
Part: C100PME3
Preinsulated tin-plated copper connector for secure wire termination.
MECATRACTION
MECATRACTION Tin Plated Copper White Cable Sleeve, 6mm Diameter, Preinsulated Closed-End Wire Connectors Series
Part: C100PME1
White tin-plated copper wire connector sleeve for secure electrical joins.
MECATRACTION
MECATRACTION Tin Plated Copper White Cable Sleeve, 6.3mm Diameter, Preinsulated Closed-End Wire Connectors Series
Part: C100PME2
White tin plated copper connector sleeve for insulated electrical wire terminations.
Brady
Brady Flame Retardant Polyolefin White Cable Sleeve, 8.51mm Diameter, 50.8mm Length, PermaSleeve Series
Part: 032144
White flame retardant cable sleeve for safe electrical wire insulation and labeling.