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Galvanised steel nut, set screw and adjustment screw; roller's body made of nylon, ball bearings. Capacity 45 kg per sash, 1 bearing, 3 positions
External support in nylon; internal support, set screw, nut, screw and balancing shaft in galvanized steel; ball bearings made of hardened steel coated with fiberglass nylon. With wide base bearings, bearing capacity 90 kg per sash
External support in nylon; internal support, set screw, nut, screw and balancing shaft in galvanized steel; ball bearings made of hardened steel coated with fiberglass nylon. With wide base bearings, capacity 90 kg. Per sash
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