The RE.F4-WEH range of wheels are characterized by their electro-welded steel brackets, which enable these wheel to sustain heavy loads. The wheels coverings are made with mould-on polyurethane, which has a hardness 95 Shore A. The wheel center body is cast iron built.
The RE.F4-WEH's axle set is mounted with a tube, calibrated for maintaining even surfaces. The set's screw and nut are secured to fasten the spacer and ball bearings securely. The series' fixed plate bracket is made with dark green powder-coated electro-welded steel, and can hold loads as heavy as 25,000 N.
The RE.F4-WEH offers three main execution models: the PSL-WEH, SSL-WEH, and SSF-WEH.