Tractor PTO spline adapters 1000 RPM to 540 RPM, 1-3/8'' 21 to 6 -lot of 2

Lot of two tractor PTO spline adapters. These are for 1000 RPM to 540 RPM. They are both 1-3/8" 21 tooth (female) to 1-3/8" 6 tooth (male). These are from an old farm estate and do have wear, some rust and soil from use.