Radial design with gradually increasing gap openings Radial design with gradually increasing gap openings
Radial reverse design with longitudinal seam (Fito) Radial reverse design with longitudinal seam (Fito)
Axial design without longitudinal seam (cylinder – Fito) Axial design without longitudinal seam (cylinder – Fito)
Axial design with longitudinal seam (cylinder – Fito) Axial design with longitudinal seam (cylinder – Fito)