Closed-End Crimp Connector, Color Clear, Insulation Material Nylon, Maximum Operating Temperature 221 Degrees F, Maximum Voltage 600 V, Minimum Wire Combination 18 AWG with 18 AWG Solid, Maximum Wire Combination 12 AWG with 12 AWG Solid, Contact Finish Tin, Contact Material Brass, Standards CSA C22.2 No 65, UL 486C, Barrel Inside Diameter 0.16 in, Compatible Grainger Part Number 376U11, 38YU61, Compatible Installation Tool Model Number CT-1550, CT-1551, CT-2500/L (CT-2550CH)