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KOOTANS 100pcs 2020 Series Sliding T Nuts Metric M3 Thread Slide in Hammer Head T-Nut for Standard 6mm T-Slot Aluminum Extrusion Profile: Amazon.com: Industrial & Scientific
uxcell 5Pcs 24x14mm Aluminium Alloy Potentiometer Volume Control Rotary Knob w Dial Face Plate,for 6mm Diameter Shaft Guitar Volume Knob. - - Amazon .com