Please note: Your original tubing shape should resemble the item image. Otherwise, it will not fit your bell. Tubing: latex free, single lumen. Eartips: Large, soft-sealing, and Latex-free. Eartips to diaphragm - approx 28 inch. Y position to diaphragm - about 21 inch. Ear tubes: Ergonomically positioned binaurals. Kindly examine the product image to ensure its appearance is compatible with your model for a proper fit.