... 3.Variety:Solid &Hollow 4.Size: 24", 36", 60". Adjustable Base JackAnping Zhonghesheng Hardware&Wire Mesh Co.,Ltd is one ... future.Material: Q235,Q195Type:Adjustable base jack,adjustable U-Head Jack,Socket Base &Universal Jack,Heavy Duty Shoring Jacks(10T-150T) for ... cribs/trestles,adjustable screw jack,,screw base jack.Finishes: ...