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1515 is a 15mm x 15mm fractional 15 series square T-slot profile with four open T-slots, one on each 15mm face. The profile has align-a-grooves to assist in alignment when connecting profiles. High quality 15 x 15mm 15 Series Aluminum Extrusion from China, China's leading 15mm 15 Series Aluminum Extrusion Product.The aluminum extrusions are easiest way to build a solid frame. This 15x15 mm bar is cut to your specified length.
You can use the frame components, like corner connectors, connector plates, in their respective category to connect multiple extrusion bars together to build a frame. M3 nuts will fit in the bars, so you can use those to easily fix plastic pieces to the bar for example. This material is easily cut yourself, making it a versatile product to use.
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http://www.mjaluprofile.com/