Sandy Trimmer Strips will apply to all solid surface exercise wheels and act as an automatic nail trimming device. Your pet will automatically trim their own nails while running on their exercise wheel! Natural mineral abrasive strips are safe to use for Sugar Gliders and apply directly to the surface of your solid surface exercise wheel. Eight (8) 3 inch x 1 inch Sandy Strips per package. Ideal for use with TreadMill Wheel 11 inch or any other solid surface wheel. You can use more or less strips depending on how much trimming you need! These specialized Sandy Trimmer Strips are made to conform to uneven surfaces and should be replaced every 6 months. Ideal for Sugar Gliders, Prairie Dogs, Degus, Squirrels, Chinchillas and other small mammals. Not suggested for Hedgehogs.