Nobo Blackboard Inserts for A1 A-Frame Pavement Display Board with Snap Frame, Black, Pack of 2Transform your Nobo A0 A Frame poster display into a blackboard A Frame for creating erasable chalk signs using chalks or Nobo liquid chalk markers. Simply lift up all four sides of the existing Nobo A0 A Frame and insert the blackboard sheet, then 'snap' shut. Replace the weatherproof anti glare PVC cover to create a long lasting chalk signs that is protected from rain, dust and dirt. Suitable for use with Nobo A0 'A' Frames, 1902206