Features: Thickening Material: Portable AC window kit is made of durable thickened PVC material which is more reinforced and not easy to age. Suitable for home or office use. Rejection of Gaps: The portable AC window kit adopts a newly upgraded interlocking structure and the inner and outer panels adopt a sliding rail assembly structure. Rejects gaps fits better and is stable without shaking. Easy to Assemble: Easy installation no drilling required You can install the Sliding Door AC Vent Kit with bare hands. At the same time it is also easy to disassemble and store for next summer. Adjustable Rails: AC window kit has adjustable rails very sturdy no need to worry about separating between the two boards. Works with most vertical and horizontal sliding windows. Wide Compatibility: Portable AC window vent kit includes 4 boards the total length is about 43cm/17.71in and the max adjustable length is 140cm/55.11in to meet the needs of different window heights. Specification: Name: Mobile air conditioner sealing plate + universal interface set color: White Material: PVC+ABS Size (about): 16432cm(6.29*16.92*0.78in)/15.5431.8cm(6.10*16.92*0.70in) (sealing plate) 19.814.5cm/7.79*5.70in (universal interface) Use: mobile air conditioner window adapter Adjustment buckle adjustment range: 43-140mm (4PCS) Notice: There is a 1-5mm error in manual measurement please check your window size before purchasing. Due to different monitors the color may be different please understand. includes: 4*Sealing plate 1*Interface 5*Butterfly buckle 1*Tape