Gilson 250513154 4-Port SPE Gas Distribution Manifold. A specialized fluidic gas manifold engineered to deliver regulated, uniform gas flow across four solid phase extraction (SPE) cartridges or drying lines. MPN / Catalog Model: 250513154 Manufacturer & Line: Gilson, Inc. / ASPEC & SPE Sample Preparation Accessories Port Configuration: 4-port output design engineered for simultaneous, controlled distribution of purge or drying gas Gas Control & Flow: Delivers regulated positive-pressure air or inert drying gas (e.g., nitrogen) to maintain reproducible solvent flow rates and efficient cartridge drying System Compatibility: Compatible with Gilson ASPEC positive pressure modules and standard manual SPE sample preparation racks Primary Application: Solid phase extraction (SPE) cleanup, sample evaporation, nitrogen blowdown, and bioanalytical sample prep prior to LC-MS or GC-MS analysis