Package:The package included 2 pcs robot vacuum bumper extender.The bumper extender 1.5″ tall. Material:High-strength PE material. Install:Need to be fixed with super glue(Not included super glue) Design:Prevent the robot vacuum from getting stuck. Features: br High-strength PE material. br Prevent the robot vacuum from getting stuck. br Need to be fixed with super glue(Not included super glue). br Size:Each vacuum bumper extender has 1.5″ tall. br Package: 2 pcs bumper extender robot vacuum