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