Features: 1) 19' standard installation 2) 24-core Dimensions (H x W x D): 130 x 487 x 260mm48-core Dimensions (H x W x D): 186 x 487x 260mm72-core Dimensions (H x W x D): 245 x 487 x 260mm 3) There are two layers for fiber arrangement and splicing inside incorporated cassette 4) The cassette could accept 12pcs of FC or SC adapters.