Today’s Funko Shop exclusive drop is a blast from the prehistoric past.

The stars of 1960s animated sitcom The Flintstones, Fred Flintstone and Barney Rubble, will be available as a Funko Pop! Vinyl two-pack, each adorned with their Loyal Order of Water Buffalo headdress.

At 2 p.m. ET Oct. 23, a limited number of Fred and Barney Pop! Vinyl two-packs will be available at Funko’s online pop-up shop for small batch pieces, Funko Shop. Orders are limited to one two-pack each.

The Flintstones is a groundbreaking animated series with an original run consisting of more than 150 episodes aired between 1960 and 1966. The franchise has shown staying power, with syndication of the original series continuing today, a pair of live action film entries arriving in 1994 and 2000, and a planned reboot in the works.

The show draws its humor from puns and anachronistic gags—it takes modern innovations like cars and recreated them with simple parts and prehistoric animals. For example, Fred drives a car made of stone and sticks that he pushes along with his own feet. The Loyal Order of the Water Buffalo riffs on modern social clubs like Shriners International and Freemasons. Fred and his coworker/best friend Barney are members of Lodge No. 26.