There are 10 sleeves (T10-T15-T20-T25-T27-T30-T45-T50-T55) with different specifications to meet the . Made of high quality , . The sleeve is heat-treated, and the is chrome-plated, which is not easy to rust and can be used for a long time. Name: sleeve set Quantity:10pcs/set Colour:Silver Material:steel Size:3/8 inch Package Contents: 1 * sleeve set 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.