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Wheel description TR-ROLL polyurethane wheels, hardness 75 Shore A; core made of polyamide 6. Ball bearing bore or bore without bearing The housing is obtained by moulding and contains ball bearings series 2Z. The hub is available also without bearings. Axle Axle composed of bolt according to UNI EN 24017 and nut according to UNI EN 24032.
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