Selmer Paris S90 Soprano Saxophone Mouthpiece Model 190 190839001597 S90 Soprano Saxophone Mouthpiece Model 190 The S90 Model Soprano Sax mouthpiece is precision machined from hard rubber bar stock material It features a square throat design and responds easily over all registers, making it an ideal choice for classical as well as studio work The S90 Model Soprano Sax mouthpiece is precision machined from hard rubber bar stock material It features a square throat design and responds easily over all registers, making it an ideal choice for classical as well as studio work