Spk-70-100-150, reddy heater spark plug, fits models akb100b, b50, b50d, b65, b65d, b66d, b70b, b70bt, b99d, b100, b100a, b100d, b100g, b100kd, b110, b110t, b140, b140d, b150, b150a, b150b, b150c, b150cak, b150d, b150f, b150ft, b150g, b150gt, b150kd, b150m, b165, b165t, b200, b200t, b350, b350a, b350b, b350d, b600, b600/a, b600b, b600d, bc70f, bc100, bc150f, bc350, bc350d, bv60s, bv125, bv125s, c100d, c100e, c100f, c150d,c150e,c150f, f66d, f110e, f110f, f110g, f110h, f150f, f150g, f150h, f150s, f350, k100a, k150, k350, k350a, k600, m50, m50d, m50s, m65, m65d, m66d, m85, m85d, m100, m100d, m150d, m150s, m350, m600, mark50, mark50d, mark150d, mc60, r70, r70a, r70at, r70b, r70bt, r70ct, r100, r110, r100a, r100b, r110m3, r150, r150a, r150at, r150b, r150bt, r150d, r150m, r150m2, r155, r165, r165t, r200, r350, r350a, r600, r600a, rc70f, rc100f, rc150f, rem100, rem100a, rem110, rem150, rem150a, rem150b, rem155, rem165, rem200, rem200t, rm200t, sb350d & sb600d.