Retrofit with short spring with clamping system to suit 4″ x 4″ bar, adjustable height, ideal for seed and fertiliser. Comes with cast closing wheel and depth ring, 15″ discs with leading cutting disc for better penetration in harder soils. 2 x Taper roller bearings in each disc hub & cast closing wheel make for a reliable bearing system tried & tested in Australian conditions. Ideal to retrofit to Shearer or Agroplow combines as well as many others. These are the same units that are used on the Serafin manufactured range.