The Dunlop Joe Perry "Mudslide" Signature Slide is a must for any slide guitarist or Aerosmith fan. It's perfect for both acoustic and electric guitars. Designed in conjunction with legendary Aerosmith rocker Joe Perry, this porcelain slide sounds soulful and bluesy, whether on an acoustic on your front porch or on a screaming electric in a packed stadium. The Joe Perry Slide comes in two sizes and lengths and features a porous interior to absorb finger moisture. This slide is the Medium/Short size. 16 x 27 x 51mm / .63 x 1.06 x 2.00". Fits ring sizes 5-6.