From The Anvil Trickle Vent Aluminium Grill
288mm x 20mm (Medium/Small)
91017 (12569) Brown
91016 (12568) Black
380mm x 20mm (Large)
91019 (12571) Brown
91022 (12610) Black
91020 (12572) White
Used for protection from insects,
low protection from weather, to be used where a moulded weather strip is in place to protect from rain.
Grille face fixes over a 12mm slot. Stainless steel pins provided.