Olcese Ricci stainless steel clamshell vents. Ideal for covering up drain holes in anchor wells or tank vents.
Available in two sizes.

SMALL CLAMSHELL VENT:
Overall Length: 40mm
Overall Width: 44mm
Internal Width: 22mm
Internal Height: 11mm

LARGE CLAMSHELL VENT:
Overall Length: 58mm
Overall Width: 56mm
Internal Width: 31mm
Internal Height: 14mm