DBK&reg; 7cm Suction Cup Mount and Tripod Adapter For GoPro Camera Hero 4 Silver Black Session 3+ 3 2 1 HD, SJcam, SJ4000, SJ5000 Brand new and high quality Compatible with GoPro HERO 3+ 3 2 1 camera Strong Suction cup can tightly keep on a variety of glass, metal and other smooth surfaces. Suction cup Diameter: 2.75 inch ( 7cm);Weight: 2.9 ounce (82 g) 30 days money back or 12 Months Limited Warranty.