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Manthorpe G961 Extension Sleeve
Produced by Kartell UK
Each unit extends the under floor ventilator a further 150mm vertically or 185mm horizontally
Internal dimension: 300mm
Manthorpe GL260 Push Up Loft Trap Door & Frame 562 x 562mm Insulated Hatch Air Bricks Manthorpe G961 Extension SleeveProduct Description White Loft Trap Push Up Door and Frame Manthorpe GL260 562 x 562mm Manthorpe low profile loft hatch. The door and frame are fully draught sealed. Required Joist Opening: 562 x 562mm. Overall Dimensions: 662 x 662mm. Supplied with 50mm of expanded polystrene insulation. Secure catches to ensure draught sealing and to prevent wind uplift. Foam compression seal for draught free fitting. Frame screws up into ceiling timbers for simpler