RT-02-132 21.5 cm (8 ½”), 1 Prong
RT-02-133 21.5 cm (8 ½”), 2 Prongs
RT-02-134 21.5 cm (8 ½”), 3 Prongs
RT-02-135 21.5 cm (8 ½”), 4 Prongs
RT-02-136 21.5 cm (8 ½”), 6 Prongs