Inner Tracheostomy Cannula Compatibility 8DFEN, 8DCT, 8DCFS, 8DCFN, 8PERC HCPCS A4623 (Disclaimer) Inside Diameter 7.6 mm Material PVC Outside Diameter 12.2 mm Storage Requirements USP Controlled Room Temperature UNSPSC Code 42271904 Usage Disposable This product is required to be reported under California Proposition 65