Affix battery-operated candles to most surfaces with these candle suction cups. Their clear color blends in with your decor, and each package contains six for your entire collection. Suction cup measures 1. 75 inches wide. To display your candle lamp, clean the surface where application will be and slightly dampen suction cup, then push the suction cup firmly against the surface and place candle lamp in holder. Please note that some natural conditions such as humidity, condensation or temperature fluctuations may affect the strength of these suction cups on windows.