Description: Light weight, composite material, tough and and durable. With holes, easy to install, can be fixed with two screws or tied with a strong rope. Need be fixed to the bicycle water bottle holder. Universal for most kinds of bikes to fix the pump. Specification: Material: Nylon Plastic Size: approx.8.5x6x3cm / 3.3x2.4x1.2inch Color: Black Package Includes: 1 Piece Bike Pump Holder