These single-piece, flexible couplings compensate for mechanical movement irregularities, such as angular and skewed misalignment, parallel offset, and axial motion. The operating characteristics provide performance benefits such as no maintenance, no backlash, no lubrication, constant rotational velocity, and smooth bearing loads. Standard couplings are manufactured in outside diameters (OD) from 3/8 to 3 in.. Metric OD’s of 15, 20, 25, 30, 40, and 50 mm are also available. Inch and metric bore sizes can also be combined. All are available in aluminum or stainless steel materials.