wooden complete with six riders , 2 lens holders, 2 pins A wooden base board with one meter scale divided into mms.with following accessories .1 each White face object & receiving screens each 150x100 mm,with aperture, mounted on wooden base with an index mark.1 Plane mirror 150 x 100 mm mounted as above 1 Lens holder V shaped , wooden.1 Needle vertically mounted in a short wooden rod, on base. 1 Candle holder on base.The components have the same optical centre height