Home » Agri-Aide Ventilation » Agri-Aide Shutters » Shutter 21″ Shutter 21″ SKU: KV-PS0021 Availability: Available Description Shutter PVC, fits 16″ SW fan with 21″ opening, stock size Related products Shutter 15″ Learn More Shutter 29″ Learn More Shutter 13″ Learn More Shutter 30″ Learn More