Construction: 1 mm with internal muffler
Hoops: Triple-flanged 1.6mm
Finish: Black Sandblasted
From the manufacturer:
Based on the extensive research and data accumulated in the first six years of the ROF project we are now able to further expand our sound palette. This is the culmination of the ROF project: Jet-Black Aluminum Alloy – with heightened responsiveness and superior impact as its primary characteristics. The longer flanged bearing edge and matte black coat finish reduces overtones. The resultant sound has an emphasized mid-range and attack, with a shortened sustain. The baseball bat type 3-positioning inner muffler comes standard – providing a further variety of sounds and enhanced playability.