“INON Mega Float Arm S” Buoyancy in water is approximately 390g, and the weight on land is approximately 219g. The arm interior is hollow, providing higher buoyancy compared to conventional products. Made of weather-resistant ABS material, durability is also considered. It controls the underwater weight of the entire camera system and can be adjusted to suit the photographer's arm strength and shooting style. - Quantity: Set of 2 There is some wear and minor scratches, but there are no problems with use. Thank you for viewing.