Weymouth bit from Bombers.

The Weymouth bar applies pressure both on the neck and under the jaw. Weymouth bits are made with a flat surface, attached to the mouthpiece, allowing for a snug stable fit. The width of a Weymouth should be slightly smaller than the Bridoon, Bombers suggests 5 mm. The four available ports have been scaled according to each width, ensuring an exact fit.
Happy Tongue Straight is a solid mouthpiece designed to relieve the tongue, but it is not curved. This makes it slightly harder than the curved Happy Tongue.