Aluminium. Improves insulation and keeps out pests, draughts and noise. Reduces water ingress. Compatible with doors with 10 – 15mm clearance. Attaches under the door. Length 914mm. Width 52mm. Aluminium. Improves insulation and keeps out pests, draughts and noise. Reduces water ingress. Compatible with doors with 10 – 15mm clearance. Attaches under the door. Length 914mm. Width 52mm.