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1 Set KF50 (NW50) Aluminium Clamp Ring - Wing Nut KF50 Flange Quick Clamp for Vacuum Pipe+ KF50 Aluminum Centering Ring with Buna-N O-ring: Amazon.com: Industrial & Scientific
Amazon.com : Workbench Light, Desk Ring Light with Swivel Clamp Arm, 6'' USB Ring Light for Reading, Craft, Makeup, YouTube, Live Streaming, Study, Architect Drafting - Acetaken : Camera & Photo
SharkBite UC953A PEX Clamp Ring 1/2 Inch, Stainless Steel, Pack of 10 - Faucet O Rings - Amazon.com