5/8 Square Bar Log Grates Steel square bar. Black powder coat finish. 16 in. Tooth Depth Model No. # of Teeth Front Width Back Width 4120 5 21.5 19.5 4124 6 25.25 23.25 4128 7 29.25 25.75 4132 8 32.75 30.25 4136 9 36.75 33 4140 10 40 36 4144 11 44 39.5 12 in. Tooth Depth Model No. # of Teeth Front Width Back Width 4218 5 19.5 17.5 4222 6 23.5 21.5 4226 7 27.5 24.5 4230 8 31.5 28.5