Test leads are usually made with silicone and PVC wire to keep them flexible, have heat and cold resistant. The insulation is chosen to be both flexible and have a breakdown voltage higher than the voltmeter's maximum input voltage.
Two probes are used together to measure voltage, current, and two-terminal components such as resistors and capacitors. When making DC measurements it is necessary to know which probe is positive and which is negative, so by convention the probes are colored red for positive and black for negative.

Kaiweets test leads kit provides safe, accurate and reliable test results on electrical power measurements.Multi-Purpose testing leads, double insulation PVC with standard diameter's banana plug. 23pcs set includes 18pcs replaceable probe tips and other accessories for different electrical work.Test leads are an integral part of the complete measurement system and extend the function of your digital multimeter.Constructed with flexible PVC/PA material that is double-layered and insulated.The silicone used is non-toxic,environment friendly and meets both the UL and RoHS standards.

Specifications:
Color: Red , Black

Materials:
Test Probe: PVC + ABS + Stainless Steel
Tweezers, Hook Clips: Copper
Test Leads: Silicone Insulated, Copper Core

Package Including:
2x test leads 3.5mm diameter with connection plug (1 Meter length CAT III 1000V/10A)
2x stretchable mini-hooks with test leads (0.75 Meter length)
1x multi-function tweezers with 3.5mm diameter test leads (0.48 Meter length)
2x 1.0mm diameter sharpest test probe for insulation piercing test 10A
2x 1.0mm diameter sharpest test probe soft silicone end cover 30V
2x 0.7mm diameter sharpest test probe PVC end cover 30V
2x testing clamp hook with push handle (CATII 1000V/5A)
2x 1.0mm diameter test probs (CAT II 1000V/10A)
2x 2.0mm diameter power probe (CAT II 1000V)
2x 3.8mm diameter power probe (C