4Pcs Bird Wood Box Predator Hole Bird Breeding Cage Ring Guard Metal Anti Bite Bird Nest Box Ring Silver

With proper inside diameter allowing your birds easily get into the box or out without any restriction.

When applied on the hold mouth of breeding box, it also can some charm to the birds box.

Excellent sturdiness and proper thickness to protect bird houses entrances.

simple in design, but very practical in use, which brings great convenience to you.

The whole appearance design of anti- bite ring is simple and generous.