These strips sandwich your cage bars to help prevent bar pinging.
Place them in worst effected areas to stop pinging.
We reccommend placing bolts every 2-3 bars however if you have particularly persistent pingers you can put them more regularly. You will be sent enough bolts for approx every 3 bars but you can purchase more in the miscellaneous section.
Although these strips help prevent bar pinging, bar chewing is still possible, however, we have found the noise of this far less irritating!