Useful Waterproof Dust Seat Post Case Mountain Road Bike Bicycle Pipe Protector Rubber Ring Cover

Label:Yes Material: Silicone Description: Bicycle seat post waterproof ring Weight: 5.4g/6.1g Prevents the rain sediment dust to enter, more can decorate your bicycle! Color: Red, black, blue, white green

Spec.: 25-30mm (suitable for 25.4/27.2mm diameter seat rod);

30-34mm (suitable for 30.4/30.8/30.9/31.6/33.9mm diameter seat rod).