ALOEU Specification: 0.370:(.) Length: 15 mm / 0.59in Upper Inner Diameter: 9.3 mm / 0.37in Lower Outer Diameter: 13.8 mm / 0.54in Material: PVC+plastic colour: Black+Blue Package Contents: 10 x Golf Ferrules Only the above package content, other products are not included. Note: Light reflection 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.