[UPGRADE DESIGN]This latest window vent kit was designed with 2 in 1 coupler, inner buckle fits 5.1 inch diameter exhaust hose (for clockwise or counterclockwise), and the external buckle fits 5.9 inch diameter exhaust hose (only for counterclockwise). [GOOD SEALING]This generation III upgrades the sliding rail interlocking construction. The plate can be perfectly embedded into the window rail to achieve a tightly sealing effect, keep the indoor temperature comfortable and cool, and energy saving. [WIDE COMPATIBILITY] Our window sealing kit is suitable for most vertical and horizontal sliding . It consists of 4 plates, with an adjustable range from 17 inch to 61 inch, to meet the needs of different sliding door heights. [EASY TO INSTALL]Our portable AC window kit is made of PVC material, which does not deteriorate easily. No tools are required, easy to install and remove, and can be used repeatedly.<br><br>Specifications Material: PVC colour: white<br><br>Package Contents: 4 x Window Seal Plates 4 x Screws 2 x Sealing Tapes 1 x Coupler<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.