Lifetime Warranty With an overall length of 5.9'' ( 150mm ).lightweight of only 0.46 lbs. The FANAUE DA-150 Double Socket Arm is made of aluminum alloy and stainless steel for increased durability and strength. It can be installed with a 1" ball, allowing you to connect other devices with 1" balls through this product, and freely match them according to your needs. The DA-150 Double Socket Arm can be used to connect two devices with B size RAM ball. The DA-150 Double Socket Arm has a total length of 3.7", which can be well extended and connected to your equipment. FANAUE offers a range of base, arm and bracket options to suit all your equipment mounting needs.It is also compatible with RAM mounts, making it a versatile and convenient tool to have.