The Siemon Splitter Lot includes 18 splitters of various types, such as YT4-E2-E2, YA4-U2-U2, and YA4-4UI. These splitters are made by the reputable brand Siemon and are manufactured in the United States. They are designed to split network cables and connectors, making them essential for computer networking setups. With a mix of different splitter types included in this lot, users can easily find the right configuration for their specific networking needs.