1 pcs Bicycle Bottle Holder & 1 pcs Bike Trailer Linker Connector With adjustable diameter for multiple bottle sizes. Hold your bottle securely, no matter how rough the ride gets. This water bottle cage adjusts to fit a wide range of bottles and hold them more securely. Durable, convenient and light design.Will hold any standard water bottle. Water Bottle holder: Adjustable base fits bottles 6 to 9.5 cm diameter Flexible, heavy-duty polycarbonate construction Color: Black Material: plastic Bicycle trailer hook: This item is a practical bike trailer hitch for towing solutions. for sturdy use. With the complete hitch arm and hitch connector, easy to install without other tools required. The hitch adpator can be compatible with universal bicycles and electric bikes. Works with quick release or nutted axel wheels. Does not work with disc brakes. colour:Black + silver Material:Plastic + copper size:23x3.5x3.5cm Package Contents: 1 x Water Bottle holder 1 x bandage 2 x Screws set 1 x Bicycle trailer hook Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.