... total station ,GPS,theodolite,auto level. 2.Material: Aluminium,best quality 3.More than 10 years experience. Head size ... screw:5/8"Weight:4.2kgPacking:23x23x116cmMaterial:Aluminium.Lock:bottom screw.Whole tripod series as follows: ModelMaterialExtended LengthRetracted LenthThread ... -515509205/8"orM16Bottom Screw1123.3KG18x18x100 auto level tripod,elevating tripod,gps tripod,aluminium survey tripod.