About this item 3.5mm 1/8' mono plug male to 3.5mm 1/8' TRS stereo jack female adapter. This adapter is made of high-quality nickel-plated brass material, ensuring a solid connection for enhanced sound quality, no signal loss, and corrosion resistance. Ideal for use with ham radios, headphones, scanners, and more. Package includes: 3 pack of 3.5mm mono to stereo jack adapters. Size: 2.36 x 2.13 x 0.35 inches.