Serpent M hardness suspension parts
Serpent now offers their 733 wishbones in a softer but extremely durable composite nylon, called M for medium. With more flex than the H parts, which are best suited for very high grip an high temperature conditions, these new M versions will perform best in all other conditions. The uprights and steering blocks remain the same composite mix as before and the new parts are indicated with a M for easy identification. Available as separate parts and as full-set.
Source: Serpent [serpent.com]