Check the listing for details. RAM-B-202-GOP1-201U RAM Double Socket Arm with Universal Action C.... Color: Black, Condition: New. Listed at 39.44 USD. RAM Double Socket Arm with Universal Action C... RAM-B-202-GOP1-201U Genuine RAM Products! The RAM-B-202-GOP1-201U consists of a 1 INCHES diameter standard length double socket arm and 1 INCHES diameter ball with custom GoPro Hero adapter. The GoPro Hero adapter attaches directly to the underside of the camera, replacing the factory mounting bracket.hardware included Assembly Hardwaresocket to socket length 3 INCHES ball size B Size (1 INCHES )weight capacity Standard Use: 2 lbsHeavy-Duty Use: 1 lbmaterials Marine-grade aluminumHigh strength compositepackaging type Poly BagWeight 0.35 lb hardware included Assembly Hardware socket to socket length 3 INCHES ball size B Size (1 INCHES ) weight capacity Standard Use: 2 lbsHeavy-Duty Use: 1 lb materials Marine-grade aluminumHigh strength composite packaging type Poly Bag Weight 0.35 lb