I've been trying out various shoulder rests, and this one was purchased on September 29, Reiwa 7 (2025), and tested for about an hour. Unfortunately, it didn't suit me, so I'm putting it up for sale. Below is an introduction from the internet: The "Mach One" series was conceived and designed by Peter Mach, a violin maker. Made in Canada, it has been a favorite among players for a long time. This "Maple Comfort" model, with its new design and carefully selected maple material, is very lightweight and offers improved fit and stability compared to the previous model! - Model Name: MACH ONE - Type: Maple Comfort - Material: Maple, Leather - Color: Natural, Lacquer Finish - Accessories: 2 types of adjustment screws Thank you for looking.