Various types of o-rings for the steel pipes
will fit the Hot Pipe / M&D / Chinese & others
Sold each
You select which type you need
brown - viton (A75 hardness up to 400*F) - most popular
orange - silicon (A70 hardness up to 425*F) - soft
white - hard teflon (D55 hardness up 500*F) - hard - hard to install