Odoo's standard inventory management lacks the granularity to track individual pieces of materials like steel with varying lengths. To address this, you can use lots/serial numbers, where each lot represents a specific length, enabling tracking of individual pieces but potentially becoming cumbersome with many pieces. Alternatively, the packages feature can track bundles of steel, useful if received in predefined bundles, but less ideal for individual piece tracking.

A simpler approach involves creating a custom field on the product form to manually update available lengths, though this lacks detailed tracking. For a tailored solution, a custom Odoo module can be developed to manage steel pieces, their lengths, and locations, offering seamless integration but requiring development effort. The best approach depends on your needs and budget, with lots/serial numbers suitable for basic tracking, packages for bundled items, and a custom module for sophisticated requirements.