This 1156mm/45.5'' long, full-size, Slimline II cargo roof rack kit contains the Slimline II Tray, Wind Deflector and 2 pairs of Rail Grip Feet to mount the Slimline II Tray to the roof rails of your BMW X3 (2013-Current). This system installs easily with off-road tough feet that grip onto the existing factory/OEM roof rails. No drilling required.-KRBX003T - BMW X3 (2013-Current) Slimline II Roof Rail Rack Kit - by Front Runner Consisting of: 2 x GOFR001 - Rail Foot Base (Pair) - by Front Runner2 x GOFR015 - Flush Rail Outer Grips / No. 7 - by Front Runner2 x GOFR036 - Flush Rail Inner Grips / G - by Front Runner1 x RRAC904 - Plastic Spacer for Rail Foot Base / 10mm (Pair)1 x RRSTD06 - Slimline II Tray - 1255mm(W) X 1156mm(L) - by Front Runner Material used: Black epoxy powder-coated T6 aluminium3CR12 Stainless Steel Approximate Installed Weight 21kg (45lbs) The t-slots on the tops and bottoms of the rack tray slats and edge profiles accommodate standard 8mm bolts. To determine the approximate height from your vehicle’s roof to the top of your Slimline II Roof Rack, add the height of the Slimline II Tray (50mm/ 2'') to the height of the Foot, Grab-on Foot or Strap-On Foot listed above.If your Slimline II Roof Rack kit uses Legs, add the height of the Slimline II Tray (50mm/ 2'') to the height of the Legs to determine the height of the rack from your vehicle’s rain gutters.If your Slimline II Roof Rack kit uses Foot Rails, add the height of the Slimline II Tray (50mm/ 2'') to the height of the Foot Rails to determine the height of the rack from the crown (highest point) of the vehicles roof. Shipping Dimensions: Width 455mm (18'')Length 1610mm (63'')Height 215mm (8'') Shipping Weight: Weight 23.9kg (52.5lbs)