Keep The Bird House Clean & Hygienic With Duvoplus Sandpaper. This Protective Floor Is Covered With Ground Oyster Shells And Sand Mixed With Anise Scent. A Practical And Essential Accessory For Every Bird Lover. Thanks To The Anise Scent, A Pleasant Odour Diffuses Around The Bird House. Moreover, The Sandpaper Is Rough And Its Abrasiveness Ensures Proper Care For The Beak And Nails. It´S Easy To Use And Clean. Lay The Sandpaper On The Floor Of The House And Trim The Paper If Necessary. Refresh The Sandpaper Each Week For An Optimal Hygiene.