Description: Light weight, composite material, tough and and durable. Easy to install, can be fixed with two screws or tied with a strong rope. Can be fixed on the bicycle water bottle holder or tied on the bike frame. Suit for about Dia.20mm pump. Specification: Material: Nylon Plastic Size: approx.8.2x6x2.5cm / 3.2x2.4x1.0inch Color: Black Package Includes: 1 Piece Bike Pump Holder