YOU ARE LOOKING AT A RYTONS 6 INCH BY 3 INCH ADJUSTABLE HIT AND MISS VENT WITH INTEGRAL FLYSCREEN FOR INTERNAL USE.

YOU WILL RECEIVE TWO VENTS 

EASY SURFACE MOUNTING IDEAL FOR COVERING VENT HOLES ACTUAL SIZE  155 mm BY 94mm

SIMPLE SLIDE ACTION TO RESTRICT AIR FLOW. EASY TO WASH AND ALL SCREWS ARE CONCEALED EASY TO FOLLOW FITTING INSTRUCTIONS ON THE BACK OF PACKAGING.

We also stock 9 x 3 , 9 x 6 , and 9 x 9 vents please go to other sellers items (shop, option vents)