The KOBALT HF Aluminum Coupler And Plug Set is a high-quality fitting kit designed for air compressor use. Made of durable aluminum, this set includes 4 items with a 1/4 inch diameter and a length of 14 inches. Perfect for power tool and air tool accessories, this set is a reliable choice for home and garden projects requiring a high flow of air. The Kobalt brand ensures a trusted and reliable product for your workshop needs.