The C3 cylindrical security portal with its vast glazed surface provides comfort and elegance together with its wide entrance. For a quicker transit, it is possible to choose the bi-parting 4 doors configuration instead of the standard 2 doors (i.e. one door each side). The central frames allow to install the portal between the walls, requiring less space on the secure side area. This security interlock system is also available in the versions approved to the LPS 1175: Issue 8 A1 (S1), B3 (S2), C5 (S3) for resistance to attacks. It is also available in many different versions (see the section “Available versions” here below).