This is a single eyepiece cover, not a set.
Mark H.
The Leupold Alumina Flipback Lens Cover models you need for that scope are models 117611 for the eyepiece and 119737 for the objective lens. The objective lens model can be found at the link below.
https://www.opticsplanet.com/leupold-alumina-flipback-covers.html
The Leupold Alumina Flipback Lens Cover that will fit your scope will depend on the specific model of Leupold 6-20x50mm scope. You will most likely need Leupold Alumina Flipback Lens Cover model 59050 for the objective lens and model 59055 for the eyepiece. The objective lens cover can be found at the first link below. The eyepiece cover can be found at the second link below.
https://www.opticsplanet.com/leupold-alumina-flipback-covers.html?_iv_objective-lens-diameter=50-mm
https://www.opticsplanet.com/leupold-alumina-flipback-lens-cover-standard-ep.html
These Leupold Alumina Flipback Lens Covers are eyepiece covers.
You would want : https://www.opticsplanet.com/leupold-alumina-flipback-lens-cover-standard-ep.html
and https://www.opticsplanet.com/leupold-alumina-flipback-covers.html CODE: LU-R2-COV-AL-FP-59045
We are provided the product photo's from Leupold, this would be the up to date version.
Model : 117611 will work for the VX5 HD 3-15x44mm.
This model #117611 will work for the VX-6 3-18x50mm.
You will want to use MPN: 59055.
You will want MPN: 59035 and MPN: 59055.