Taco Shut-Off Freedom Flange™ are sold as a set, it comes as a pair.

This Taco Flange is a combination full port shut-off ball valve and companion flange for most Taco circulators. The simple quarter turn, lever handle operation allows for easy isolation, removal and service of circulators without draining the system.

Each flange set includes:
Bolts
Nuts
T-Handle

Flanges are rated for 240°F, 150# WP/600WOG.