Product Description: Made of high-quality flexible silicone, these strain reliefs hold Ethernet cables securely in place, preventing them from coming loose or snapping. They also help keep cables neatly organized, making it easy to identify and troubleshoot any problems that may arise. Flexible PVC strain relief sleeves distribute pressure to prevent cable ends from breaking and insulate the RJ45 plug from dust and oxygen for a longer life. These RJ45 boots are used to protect Ethernet cables and network equipment from damage caused by installation, disconnection and cable snags. Compatible with Cat6, Cat5e and Cat5 cables, these protectors are a must-have accessory for terminating custom RJ45 cables. Insertion requires pressing down on the locking tab of the cover, which is the same thickness as the insert. Due to the flexibility of the sheath, loosening a connector with a sheath is easier than one without. Be sure to slide the sheath onto the cable before making the modulating plug; if you slide it on backwards, you will not be able to install the sheath. Protect your cables with these high quality strain relief covers to ensure a smooth and reliable connection. Specification: Material: Plastic Color: Blue Temperature Rating: 257 degree fahrenheit Connector Type: RJ45 Size: 2.7 x 1.5 X 1.6cm/1" x 0.6" x 0.6"(L*W*H) Package included: 120Pcs RJ45 Boot Cover