Color classification
Dark cloud grey - static sliding wheel - plastic double-layer frame
Milling White - static sliding wheel - plastic double-layer frame
Light gray - [Metal Frame - Engineering Back]
Suiner Orange - Plastic Frame [Silent Sliding Wheel - Engineering Back ]
Youth White - [ Metal Frame - Engineering Back ]
Light grey - plastic frame [Silent sliding wheel - engineering back]
Milling White - Metal Frame - Silence Roller
Dark ash - Metal frame - static sliding wheel
Cargill - static sliding wheel - plastic double-layer frame
Cargill - Metal Frame - static slider
Suiner Orange - [Silent Slide Wheel - Plastic Double Layer Frame]
Suiner Orange - Metal Frame - Silence Roller
Light brown - static sliding wheel - plastic double-layer frame
Suiner Orange - [ Metal Frame - Engineering Back ]
Light brown - Metal frame - static sliding wheel
Youth White - Plastic Frame [Silent Sliding Wheel - Engineering Back ]