Stabilize your Hi-lift Jack with this space saving base extension.​ For use under Hi-Lift jack in mud or thick sand. Raised middle section to stop jack slipping. Black powder coated steel. Flat for easy storage. Materials used:4mm (0.16") black powder-coated mild steel Product dimensions:W 300mm (11.8") x L 368mm (14.5") x H 14mm (0.6")Raised Middle Section: W 130mm (5.1") x L 200mmx (7.9") H 10mm (0.4")  Weight:3.3kg (7.28lbs) Note:Fits the Hi-Lift jack 1.2m and 1.5m (47"and 59") (or a jack with a foot plate not bigger than W120mm x L190mm (W4.7" x L7.48"))