Size Name:3/4-12mm Description: This fitting has a male tapered BSP thread with a barbed hose tail. Manufactured from solid brass for the use with air, water, gas and other fluids. We have a large range sizes starting at 1/8" (3mm) up to 1" (25mm). Specification: BSP Thread Size Hose Internal Diameter 1/8" 6mm 8mm 10mm 12mm 1/4" 6mm 8mm 10mm 12mm 16mm 3/8" 1/2" 6mm 8mm 10mm 12mm 16mm 19mm 3/4" 8mm 10mm 12mm 16mm 19mm 25mm 1" 19mm 25mm Pack: 1x BSP Hose connector