The MST Bowman Lacrimal Probe Sizes 3 and 4 (Item #AL1350) is a purpose-built ophthalmic instrument in the Lacrimal Instruments portfolio. Designed around its specific working geometry, it features sizes: 3 and 4. Variety of sizes. Sterling silver. Overall length: 149mm. This combination of thoughtful design details and clearly defined specifications helps surgeons quickly identify the configuration that best fits their preferred technique and procedural needs.