Vandoren LC590DP M/O V16 ligature baritone sax

The Vandoren M/O ligature has many of the same advantages as the Optimum and Master ligatures, but is made with less material, making it lighter, while still amply supporting the reed. 
Comes with a plastic cap. This model is made especially for Vandoren's V16 ebonite mouthpieces for baritone saxophone. 

Model LC590DP fits: 
V16 hard rubber mouthpieces for baritone saxophone