These are 100 pieces Heat Shrink Bu-tt Connectors, which can give the connection a effective protection, even in awful condition.

Features:
Heat shrink wire crimp terminals Bu-tt, can strongly hold the crimps.
Waterproof and prevent corrosion, can effectively protect the connection.
Allow visual inspection.
Easy to install. Once crimped, heat with a heat g(un to shrink, creating a permanent waterproof bond.
Compare to ordinary connector, it's more durable and convenient.
These work great for automotive, marine, and many other applications.

Specifications:
Color: clear red
Suits cable / wire sizes: 0.5-1.5mm² / 22-18AWG
Length: approx. 35mm
Quantity: 100pcs
Voltage resistant: ＞600V
Volume resistivity(Ω cm): ≥10 15
Dielectric strength(KV/mm): ≥25
Protection type: IP67
Operating temperature: -55~125℃
Package Size: 15 * 10 * 2cm / 6 * 4 * 0.8in
Package Weight: 129g

Package list:
100 * Heat Shrink Bu-tt Wire Crimp Connector

Tips: Once crimped, heat with a heat g(un to shrink the out sleeve and activate the adhesive creating a permanent waterproof bond.