The DAIKIN AC Part Number 99S0209 Adapter is a new brass adapter designed to convert a 5/16" connection to a 1/4" connection, with a length of 2-3/4". Specifically manufactured for DAIKIN AC systems, this adapter is a crucial tool for HVAC and refrigeration professionals looking to connect gauges and probes in their work. The durable brass construction ensures longevity and reliability in demanding commercial and industrial environments. Item weight is 2 ounces. Free shipping to the lower 48.