Accurate Fit — Designed for 100 mm round ducting (Ø 103 mm) with 150 × 150 mm outer plate and 134 × 134 mm step. Ensures accurate centre alignment for round ducts through walls or ceilings Quick and easy installation – Pre-drilled fixing holes allow fast screw mounting. The lightweight yet rigid plate fits neatly over wall openings for a professional finish. Versatile applications – suitable for ventilation, extractor fans, hvac, and duct systems in bathrooms, kitchens, offices, and commercial spaces. compatible with standard 100 mm fittings. Clean, tidy appearance – hides rough edges and improves the look of ducting runs, ideal for extractor fans and hvac installations. Durable PVC Construction – Made from strong, uv-stabilised white PVC that resists sunlight damage and cracking, suitable for long-term indoor or outdoor use., Manufacturer: FANTRONIX