- Adaptor arms to convert VESA 100mm x 100mm mounts to VESA 200mm x 100mm- Converts VESA 200mm x 100mm mounts to VESA 200mm x 200mm- Simple installation with all mounting hardware included- For 200mm x 100mm use with any 100mm x 100mm VESA mount (BT7510 / BT7511 / BT7512 / BT7513/BT7518)- For 200mm x 200mm use with any 200mm x 100mm VESA mount (BT7521 / BT7522 / BT7514 / BT7515)