A 4.8 x 300mm nylon cable tie is a common type of fastener used for bundling and securing items, primarily electrical cables and wires. It is a self-locking tie made of nylon, typically Polyamide 66. These ties are 4.8mm wide and 300mm long, making them suitable for a variety of applications. They are known for their ease of use, high tensile strength, and resistance to weathering and aging.