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Outwater Mill Finish 1-3/8'' Inside Dimension Aluminum U-channel 36'' Length (pack Of 4) Alu578-m C-channel in the Furniture Moulding department at Lowes.com
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Amazon.com: 8020, 1050, 10 Series 1 Inch x 0.5 Inch T-Slotted Aluminum Extrusion One Channel Linear Slot Bar Rail 80/20 (24" Long, Clear Anodize) : Industrial & Scientific
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Amazon.com: 8 FT (96") - Anodized Aluminum U-Channel 6063 Alloy T-6 Temper ( 1" Channel) : Industrial & Scientific
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Everbilt 1/2 in. W x 1/2 in. H x 96 in. L Aluminum C-Channel with 1/16 in. Thick 802657 - The Home Depot
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