TOPEAK AERO WEDGE DX Aero shaped wedge pack with easy-to-use quick release mounting system. External zipped pockets keep tools away from tubes and delicate items. Suggested use: Medium: MTB, Small: road. Tail light strap 1000 Denier Teflon coated fabric 3M Scotchlite reflective strip Small 7.6x16.5x8.3cm Medium 8.9x19x9.5cm