The Filament Support is designed to fit into a 15mm x 15mm Aluminium profile beam without requiring any screws. Identify the location were you wish to mount the support and place the small end into the cavity and rotate by 90 degrees to lock the support in place. Feed the filament through the centre. Printer: Labists ET4 Rafts: No Supports: No Resolution: 0.15 Infill: +50% Filament_brand: SUNLU Filament_color: Black Filament_material: PLA