Use these 1 3/4" Diameter Suction Cups with a Hook to hang signs in windows, walls or any smooth non-porous surface. Using suction cups allows you to easily display things without ruining a wall with glue or sticky substances! These suction cups are extremely durable and can support a great deal of weight. In Additional Details ------------------------------ Product description: Use these 1 3/4" Diameter Suction Cups with a Hook to hang signs in windows, walls or any smooth non-porous surface. Using suction cups allows you to easily display things without ruining a wall with glue or sticky substances! These suction cups are extremely durable and can support a great deal of weight. In