Each tray provides space for mounting fiber splice protectors and excess fiber. Organize fiber connections with easeFOST04A 4 cores Fiber Optic Splice Trays are used as an important accessory for fiber cable management items. You would often find one or several fiber optic splice tray in a fiber optic splice closure, optical distribution frame or a. LongXing ST series splice tray is used in optical distribution frame, distribution box, and splice closures, which is engineered for use with indoor or outdoor splice hardware with both loose tube and tight-buffered optical cable designs. Coyote, Starfighter, Lite-Grip, Type 2S, 2R, 2M, 4A, 4R, 4S, and more.