30mm Extreme High Load BlockSingle Extreme High Load Block For Laser ILCA. The A2031XHL 873 is a Laser ILCA specific vang block. Designed with a custom body which incorporates the Laser ILCA vang key to give maximum strength in the smallest package possible. This design eliminates the need for shackles or rope to attach the Vang key. XHL Bearing Technology The XHL range has been designed to deal with extremely high loads without compromising on low load dynamic performance. This