3M™ Fusion Splice Insert 2521-F is designed to hold up to 12 single-fusion splices. It is compatible with 3M™ Fiber Dome Closures, 3M™ Fiber Optic Splice Closures 2178, 3M™ Fiber Dome Terminal Closures and 3M™ LL Series Closures. These inserts can be used in 3M(TM) Fiber Splce Trays 2538, 2522 and 2523.
3M™ Fusion Splice Insert 2521-F is ideal for indoor applications. It requires a single-fusion heat shrink sleeve.