For Outdoor and Indoor use - Water Resistance Grade : IP65
IP65 - IP rated as Partial protection against dust that may harm equipment.
Protection against low-pressure jets (6.3 mm) of directed water from any angle (limited ingress permitted with no harmful effects).
The design may dust-proof, UV protection.
Meanwhile also can satisfy the fiber bending radius and small redundant fiber inventory requirements, to provide security for the import of optical fiber