5x 8 1/4"x3" Adjustable Air Vent Cover Anodised Aluminium Int. / Ext. Walls (E)

5x 8 1/4"x3" Adjustable Air Vent Cover Anodised Aluminium Internal External Walls in Silver colour. The size is 8 1/4" x 3" or 210mm x 76mm with free airspace 3,575mmSq (5.5"Sq). From a leftover project I have these Adjustable air vents.

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