These Worker High Crush Flywheels have serrated teeth and are the newer ABS "high crush" version. They are .5mm wider than the white ones and slightly heavier.  We use the standard version of this flywheel on our Jupiter Blaster.  The V2 version has taller specs incompatible with our Jupiter Shell until revisions are made once we sell out of the Standard version. 

FEATURES:
• Upgrade in FPS
• High grip on darts
• Good wheels for most motors

SPECS:
• Class: Full-Size
• Max Crush: 39.0mm (center-on-center)
• Outer Diameter: 36mm
• Root Diameter: 35mm
• Concavity: 12.25mm
• Height: 18.6mm (14.0mm without nub)
• Surface: Serrated
• Shaft Interface: 2mm
• Inner Diameter: 30.9mm
• Weight: 8g each
• Material: Black POM/Acetal plastic
• SKU: W0241