*Bird Box Protector Stainless Steel 25 27 32mm Ø Hole Blue Tit Great Tit Sparrow
32mm Ø hole, suitable for House Sparrows and other small birds. 1 x Stainless Steel Bird Nesting Box Hole Protectors. 25mm Ø hole, suitable for Blue Tits, Coal Tits, Marsh Tits. 27mm Ø hole, suitable for Great Tits, Tree Sparrows.