Stock the optics your network actually uses. This AddOn TAA-compliant 4-pack of 1000BASE-SX SFP transceivers is designed for Gigabit Ethernet fiber deployments that depend on short-reach, repeatable performance. It gives infrastructure teams a practical spare strategy for access switches, aggregation layers, and other ports that need consistent optical behavior. The 4-pack format is useful when you are standardizing replacements across multiple closets or keeping approved inventory on hand for service windows. 1000BASE-SX is a familiar choice for multimode fiber environments where short-distance links and predictable throughput matter more than long-haul reach. For teams managing procurement controls, the TAA-compliant designation helps align sourcing with policy requirements. Compared with buying optics one at a time, a matched multi-pack reduces administrative overhead and keeps field replacements aligned. It is a straightforward way to protect uptime, simplify spares planning, and maintain a consistent optical baseline across the network.