CXAK Heavy Duty Suction Cup for Mac Screen Repai iPod Macbook Retina Air iMacr-Red Heavy Duty Suction Cup for Mac Screen Repair. Super suction The highest can suck up 20 kg object. Constructed of strong ABS plastic, soft rubber suction pad does not scratch or scuff surfaces Diameter: 55mm,weight70g Locking mechanism ensures a good seal every time