PVC corrugated drain pipe with geotextile filter. Perforated. Outer diameter 50±0.5mm. Package: 50m (roll). 6 rows of holes, per 1m - 400 perforation holes. Hole width: 1.2mm. Area of holes per meter: 24cm2. Weight: 370g/m. Weight of roll: 18.5kg. Price for meter!