Our company has spent more than 10 years researching and testing suction cup materials and performance structures, creating a product with superior performance, strong attraction, superior structure, long-lasting softness (material), and strong and long-lasting adsorption。
Suction cup locks and holds up to 100 kg(stays up after suction and cannot be removed with simple arm strength). For short holding  period (few days ),the cup can hold up to 25 kg. Recommended weight range for long holding period is under 8 kg。
The length of suction time depends on the appropriate environment and appropriate operation and installation  (please refer to the user manual)。This suction cup can withstand: fog, rain & sun。
(the manual on the reference Quality Assurance) You can return the product if there is no web page description effect within 30 days after purchasing the device (use page)。