Bought an older, carbon railed, saddle (I believe a specialized Toupe. Branded with "FACT"). But rotary carbon rail seat post adapter I bought from Specialized doesn't fit it. Seat post is a
Amazon.com : CyclingDeal Bike Bottle Cage Saddle Mount Adapter for 1 Bottle Cage - MTB Road Bicycle Saddle Rail Mount Water Bottle Holder with Adjustable Angle - Aluminium Alloy Adapter for Road
Bike Seatpost Clamp For Carbon Saddle Rails Adapter Bicycle Seatpost Tube Oval / Round Clips Cycling Accessories - AliExpress
Amazon.com: CyclingDeal Bike Bottle Cage Saddle Mount Adapter for 2 Bottle Cages - MTB Road Bicycle Saddle Rail Mount Water Bottle Holder with Adjustable Angle - Aluminium Alloy Adapter for Road Use
Anodized Clamp 7+9mm
Seatpost Clamp EAR 7x9 7x10 Ti Bolt Kit for CARBON RAIL for Specialized Tarmac | eBay
Specialized 7x9mm Carbon Rail Seatpost Clamp – Sierra Bicycle Supply
Amazon.com: Boenoea Bike Seat Clamp Bicycle Seat Adapter Fit for Standard Rail-type Saddles : Sports & Outdoors