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Amazon.com : SR Suntour SP12 NCX Suspension Seat Post with Protective Cover 31.6X350mm,Black, VK1919 : Sports & Outdoors
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SR Suntour NCX Seatpost Suspension MTB Bike Shock Absorber Seatpost for Bicycle Seat Tube 27.2 28.6 30.0 30.4 30.8 31.6 33.9mm - AliExpress
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