Description: Head Roller Design: Cabinet jack support pole, double jack roller head design with four rollers, length 8.4cm\/3.31inch width 7.9cm\/3.11inch. It can also be easily adjusted up, down, left right when supporting the cabinet. There are two jacks under the head for you to choose. Double Jack Holder: Adjustable support rod the double jack head can not only install slate basins, but also ceramic integrated basins with water retaining strips. Base Anti Slip Mat: PVC material anti slip mat, length 12.5cm\/4.92inch, width 9.6 cm\/3.78inch; screw base integrated design, stable support, screw diameter 2.8cm\/1.10inch. Extension Rod: The extension rod is thickened as a whole, with a diameter of 2.88 cm at the bottom, a total length of 11 cm\/4.33inch, a usable length of 9cm\/3.54inch. Scope of Application: Labor saving lifting bracket is for cabinet installation support. Specification: Material: Nylon Plastic Load Bearing Capacity: 1Pair can bear 200kg(Optional). Product Size: Adjust Height 19cm-44cm\/7.48inch-17.32inch Head Size: Long 8.4cm\/3.31inch, Wide7.9cm\/3.11inch Bottom Size: Long 12.5cm\/4.92inch, Wide 9.6cm\/3.78inch Available Height of Extension Pole 9cm\/3.54inch Package Includes: 1Piece\/2PiecesCabinet Jack Support Pole(Optional) Note: Please allow slightly errors 1-2cm differences due to manual measurement.