These are the same cap that Francois sells with all his ligatures.  They are made out of black plastic. 

We have them available for alto or tenor for the same price.

The Ultimate and Pure Brass ligatures can be adapted to thinner mouthpieces with the level expander. 

Fits all models of the above named ligatures.

Set of 3 interchangeable pressure plates for use in all Francois Louis Ligatures.

Stainless Steel, Stainless Steel with rubber coating and Solid Brass.

(Alto plates shown in picture.)

They are still selling the two screw ligature for bass which holds the reed securely and provides a nice sound quality.

Solid Brass, gold lacquered for Selmer Bass Mouthpieces.