Maver signature series 800 seat box mavers signature 800 seat box hosts a verity of features that include an upgraded runner system which accommodates the included stacker module stopper supports to avoid injury whilst adjusting the box height new anodised telescopic legs all round a bespoke wheel system and double brace barrow arms included maver signature 800 seat box anti memory two colour seat cushion double brace barrow arms and wheel kit 30mm storage tray 20mm stackin