Thule car top carrier. adjustable car top carrier, very easy to put on vehicle inside has knobs to tighten the unit and adjust it. excellent condition . key lock on either side has 2 keys with unit. can open from either side. this unit is 17cu ft. 91.5 length,31.5 width,15.7 height. holds approx. 40 lbs . can handle 6th 8 pairs of skis or snowboarding.