Dot Line 4.5" Vacuum Cup with 1/4"-20 Post

The Dot Line 4.5" Vacuum Cup with 1/4"-20 Post securely attaches to car windows, doors, hoods, and other smooth surfaces and supports camera/accessory loads up to 50 lb. It uses a push-pump mechanism to pump the air out between the cup and mounting surface, and a red line imprinted on the pump lets you know whether any air is left or has seeped back in. The cup is 4.5" in diameter and features a 1/4"-20 post fixed on top. The post supports cameras, lights, mics, and other accessories, ideally via articulating arms and ball heads.