MP9742 48mm Ribbed Jockey Wheel 300Kg (MP9742)MP9742 48mm Ribbed Jockey Wheel 300Kg Constructed for heavy duty trailer applications up to 300Kg static nose weight Serrated anti vibration tube prevents slippage through the clamp Heavy duty ball race thrust bearing ensures easy handle rotation Grease nipple bearing lubrication inlet R clip & chain prevents handle rotation while travelling Enhanced clear zinc plating gives 300+ hours of red rust resistance in salt spray testing