Looks like XCaliber. Light rust on bolt.
Vintage Odyssey BMX Seatpost Clamp 25.4mm Black Alloy Holey Old School BMX
Eastern Bikes Throttle Series BMX Seatpost Clamp (Chrome)
Affix 28.6mm BMX Bike Seatpost Clamp Alloy Fat Lip 2 Bolt Clamp Coloured
wanhaoaony Bike Seat Clamp Bicycle Seat Post Clamp Ultralight Bike Seatpost Clamp Road MTB Mountain Bike Seat Post Seatpost Clamp Seat Post Clamp (Color : Purple-34.9mm)
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Bike Seat Post Clamp,Black Aluminum Alloy Seatpost Clamp Quick Release Seatpost Clamp Bicycle Quick Release Seatpost Bicycle Mounting Tube Fittings for Road & Mountain Bikes (31.8mm)
