Easy Trim Cavity Vertical Extension Sleeve
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The Cavity Vertical Extension Sleeve Is Designed To Be Used In Conjunction With The Telescopic Underfloor Vent. Each Extension Sleeve Allows The Vent To Vertically Reach A Further Two Brick Courses And Can Also Be Fitted To The Base Of The Telescopic Underfloor Vent Providing Horizontal Extension. Extends The Vent Vertically To Reach A Further Two Courses Can Be Used On The Base Of The Telescopic Underfloor Vent To Provide Horizontal Extension
