The product shown is a box of TP-LINK Ethernet RJ45 8P8C UTP Cat.5e/6e Connector Plugs, also known as "crystal heads".
This is a high-performance modular plug designed for use with Ethernet cables.
The box contains 100 pieces of the connector plugs.
The connectors are designed for Unshielded Twisted Pair (UTP) Cat.5e and Cat.6e cables.
They feature an 8P8C configuration for standard Ethernet connections and have gold-plated contacts for better conductivity.