bird deterrent discs, great bird control solution, bird deterrent product, also a nice looking decoration for your house Birds dislike shiny, moving objects. This bird repellent device can swivel 360 degrees easily and reflect. different color sunlight to create a flashing and dazzle effect to scare birds away. Humane, no harm to birds. Double sided holographic reflective bird scare discs, 3 inches in diameter, light deterrent. High quality, more effective, no more birds problem. Keep birds away from your house, garden, fence, roof, orchard, yard, lawn, deck, boat, crops etc. Stop pest birds from damaging your property. Prevent window strikes from birds. Most birds can be deterred by the repellent disks, such as pigeon hawk crow geese seagull sparrow woodpecker duck etc. Easy to use. Just hang it anywhere you need to repel birds. Please note that these discs come in separate piece, ASSEMBLY IS NEEDED, it's very easy. size:The total length is about 18.3cm,Disc diameter is about 7.6cm Material:PS, metal colour:color Package Contents: 16 * film 24 * ring 8 * hook 8 * rotating link ring Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.