This cup holder is made of ABS/plastic. Featuring 360 degree rotary clamp without movement/flexible silicone petals in the bottle slot. Inner diameter of the phone slot is about 3 inches. Suitable for round pipe diameters of 0.9 to 1.7 inches/water cup diameters of 1.5 to 3.3 inches. 7" L x 3.3" W x 3.9" H. 7" L x 3.3" W x 3.9"
