Box Jack Weld On 1000Kg 70mm Square€1.00Box Jack Weld On 1000Kg 70mm Sq. Box Jack Weld On 1000Kg 70mm Square quantity Add To Quote Part Num: 6063 Categories: Trailer Equipment & Accessories, Car Trailer Fittings, Jockey Wheel & Prop Stands, Box Jacks & Prop Stands Description DescriptionJack Trailer Box 1000kg Top Wind,Weld On – 70mm. Base Plate = 165mm. Adjustment = 660 – 980mm. Adjustment from top of outer box 500- 840mm. 70mm outer and 60mm inner box width.