GigaMax 5e 110-Style Wiring Block, 89-D Bracket Kit, Cat 5e w/C4s&C5s, 50-Pair Dependable, flexible, and cost-effective, Leviton 110-style and 66-block cross connect products are ideal for telecommunications rooms and distribution frames. 110-style wiring blocks are available in CAT 6A, 6, and 5e, and can be mounted to the wall or plywood backboard. Rack-mount solutions are also available.