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