Yamaha YACSAX-MKIT Saxophone Maintenance Kit Mixers Cobalt Slinky guitar strings are

Cobalt Slinky guitar strings are also soft and silky to the touch

FIR-X™ tuning simultaneously optimizes frequency and phase response while adjusting the time alignment between the HF and LF transducers

Compatible with iPhone X*

Jitter <20 ps RMS (20 Hz - 20 kHz)

Yamaha YACSAX-MKIT Saxophone Maintenance Kit Mixers Cobalt Slinky guitar strings areProtect and maintain your sax with genuine Yamaha accessories to keep it in excellent condition for years to come. The Yamaha Saxophone Maintenance Kit contains: Cork Grease Tone Hole Cleaners Pad Cleaning Paper Cleaning Swab Mouthpiece Brush Polishing Cloth Care & Maintenance Manual