These stainless steel adaptors allow you to make adaptations to ChiaoGoo Interchangeable needles:
Item #2501-AM  will allow you to go from a SMALL [S] interchangeable TWIST/SPIN tip to a MINI interchangeable TWIST cable.
Item #2501-A will let you go from from a LARGE [L] interchangeable TWIST/SPIN tip to SMALL [S] interchangeable TWIST/SPIN cable.