These adaptor plates give you the ability to attach a Thule slotted Load Bar or Aero Bar and Thule Accessories to a Front Runner Roof Rack. Works with: Both the SLOTTED SQUARE and AERO Thule Load Bars. Materials used: 2.5mm (0.098) 3CR12 stainless steel, supplied with mountings for Aero and Square Bar Consists of: 4 x Thule Load Bar adaptors and a nuts and bolts kit Product Dimensions: L 285mm (11.22) x W 205mm (8.07) x H 55mm (2.16) Weight: 2kg (4.4lbs)