Fiber optic sleeve is a fusion protection sleeve to protect the splice joint and exposed fiber when two fiber optic cables are fusion spliced together. It is generally made of hard plastic, aluminum alloy, or even stainless steel and can be attached with screws or adhesive tape. These sleeves have an after shrink diameter of 2. The splice protection sleeves are constructed with. Molex's optical splice protection sleeves with inner-sleeve ethylene vinyl acetate provide a moisture-resistant barrier after shrinkage and afford fusion splice protection in field fiber splicing assembly, manufacturing, and optical fiber closure applications. The proper operating temperatures are -55 to 100°C (-67 to 212°F).