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GRIFF EPDM Cushioned P Clamp – 12mm x 25mm - Environmental Marine
Tube Clamp PVC 10 - 12mm black – EK Webshop
Amazon.com: Kyuionty 50Pcs Spring Band Clips 1/2" 12mm Air Hose Tube Water Pipe Fuel Hose Line Vacuum Hose Clamp, Fit 12.5-13mm OD (Black) : Office Products
Amazon.com: 4pcs CNC Aluminum 12mm Round Tube Mount Clamp with Hardware : Toys & Games
T-shape 12mm Multi-rotor Arm Clamps/Tube Clamps - Black (4pcs) [QA142] - $4.80 : RC Brushless Gimbal FPV DRONE UAS, OFFTHEGRIDWATER.CA
LINK CNC Stainless steel tube cross clamp pillar double orifice fitting connectors for 12mm 13mm shaft - AliExpress