1640 Pcs Pre-insulated/ Non-insulated Lugs Wire Ferrules Insulated Crimp Terminals Wiring Ferrules 12-22 Awg Electrical Butt Connectors For ElectriciaThe product is shipped based on the color or size of the main image of the product page.Cable Ferrule Kits: 1640 Crimp Lug Connector Set includes 590 Pre-insulated wire ferrules and 1050 non-insulated crimp terminals. Type of interface: AC/DC. Working frequency: low frequency.Non-Insulated Butt Connectors: Non-insulated electrical terminals of 5 types: 0.5mm (400pcs), 1.00mm (200pcs), 1.5mm (200pcs), 2.5mm (150pcs), 8mm length. 4.00mm (100pcs), 9mm length.Pre-insulated terminals: insulated wire ferrules with PVC heads in 5 types: red 0.5mm (200pcs), blue 1, 00 mm (150 pieces), black 1.5 mm (100 pieces), yellow 2.5 mm (80 pieces). , green 4.00mm( 60 pieces).Application: Uninsulated crimp ferrules can effectively prevent the wire ends from being stripped or broken. Copper wire ferrules have good electrical and thermal conductivity, which can provide reliable connections. These ferrules designed with an insulation flare make it easy to insert the wire.Tinned Copper: Electrical butt connectors are made of red copper, tin plated to prevent oxidation and rust, more durable to use. Widely used for electrical projects, workshops, auto electricians, machinery, cars, trucks, motorcycles, etc.How to use: Remove the wire core from the case. The stripping length should be as long as the metal sleeve of the terminal. Place the entire core inside the ferrule terminal of the wire end without being exposed, then crimp the terminal. Before that, please adjust the crimping tool according to the wire core thickness.