Standard 1/8 BSPP size for color ball or for PCP air .Can be used between -type bore hose and SCUBA cylinder charging fitting.Socket fitting supplied with 1/8 BSPP male thread with cone for connection to a -type bore filling hose.Available with the UK industry standard 1/8 inch BSP male thread that fits most of the pump and cylinder fill lines.Safe for use on all pre-charged equipment with a maximum working pressure of 340BAR, 5000psi. Do not exceed maximum working pressure.size:18 x 47mmMaterial:metalcolour:Silver + yellowPackage Contents:2 x Inflatable jointOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.