Vintage Softride Seatpost Clamp Guts Beam Rail Allsop Seat Clamp Alloy Adjustable Softride Seatpost Clamp. Weight: 125 g. Only the parts shown in the pictures are included.
Taken off a frame I purchased. 140mm reach. fits 1" tube. 25.4mm clamp. I haven't used it under normal trail conditions. Only riding around a bit on pavement. Use at your own risk.