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Our glass cannula packs contain a dozen high quality hand-made pipettes for cannulating vessels of a wide range of sizes. We polish the cannula tips to have a distinct beveled edge, which facilitates vessel cannulation. Some of our popular sizes are listed below. Please inquire for custom sizes not listed. Our standard 25 µm size ranges are ideal for blind-sac experiments. When working with intraluminal flow, it is preferable to have cannulae that are matched more closely in size. If you intend to work with intraluminal flow, let us know when you order your cannula packs; we will match the cannulae to tolerances that are tighter than our standard 25 µm for a nominal fee.