Strauss Cycle Mobile Phone Holder with Mount Bracket (Black) and Bicycle LED Headlight with Horn Material: Other In-Box Contents: 1 Double clamps with silicone mats to hold your phones or other devices and protect your devices. An adjustable clamp design on the pedestal, convenient installation onto different bikes. (supports those handlebars, the diameters of which are between 15mm and 30mm.) quality ABS material can be stable and durable, 3 LED lamp provides lower power consumption and ultra long lifespan brighter than normal lamps