Stainless Steel, Large. SlidrStainless steel has a bright, penetrating sound with great sustain and sparkling harmonics. Stainless steel coaxes a beautiful top end from the guitar, making it an excellent choice for warm-sounding acoustics and vintage electrics. A frosted interior coating ensures a non-slip grip. You can also use a stainless slide to turn your modern, high-output guitar into a real screamer.Small fits ring size 9, and large fits ring size 11.5