This is Herschel's base card from the 2018 Panini Flawless set. The base cards are called Gems Ruby. There are 115 cards in the set and all the base cards are serial numbered to 20. The above example is #6.
Parallels in the set are: Sapphire #'d to 15; Diamond #'d to 10; Emerald #'d to 5; Chocolate Diamond #'d to 4; Canary Yellow Diamond #'d to 3 and Platinum which is a 1 of 1.
These cards come slabbed from the manufacturer, with a tamper proof seal at the top.