Does anybody have an alternative to T-Slot Aluminum?

Does anybody have an alternative to T-Slot Aluminum? aluminum slot ALUMINUM EXTRUSION SPECIFICATIONS: Elasticity – approximately 10,000,000 lbs sqin Hardness – Webster Model “B” 11-12 aluminum t slot rail Of numerous aluminum extrusion profiles, v-slot and t-slot aluminum profiles are the most common ones Sometimes they are used interchangeably, but they are not

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