The GSB187 is an inner sleeve connector made of tin-plated hard bronze for a shielded cable grounding system made of 2 cylindrical sleeves, for solderless crimp connection. Length 5/16 Inch/7.9mm, inner diameter .187 Inches/4.75mm, outer diameter .227 Inches/5.76mm. The sleeve is color-coded according to their size. The color code is yellow.