Amazon.com : Funn UpDown Mountain Bike Dropper Seatpost 4 Way Mount CNC Remote Lever kit fits Both External and Internal Routing droppers, Smooth Action Easy-to-Use (Black) : Sports & Outdoors
Funn Crossfire Seat Post Bicycle Seatpost Mtb Length 400mm Diameter 30.9mm 31.6mm - Bicycle Seat Post - AliExpress