This is a used 1 3/8″ 1000 RPM Female 21 spline TO 1 3/8″ 540 RPM Male 6 spline PTO Adapter. Most likely “Hub City” but not marked. Minimal use on small acreage farm for tile repair. Splines are in excellent shape with very minimal to no wear. Set screw moves freely. See pictures for more detail. The item “PTO Adapter 1 3/8 1000 RPM Female 21 Spline to 1 3/8 540 RPM Male 6 Spline” is in sale since Thursday, April 18, 2019. This item is in the category “Business & Industrial\Heavy Equipment, Parts & Attachments\Heavy Equipment Parts & Accessories\Other Heavy Equipment Parts & Accessories”. The seller is “brent0690″ and is located in San Tan Valley, Arizona. This item can be shipped to United States.