For which wall thickness are S4 and S7P windows suitable?

NOTE: Before installation, check the wall thickness of your vehicle and check whether the wall hole
(space between inner and outer wall) needs reinforcing? Consult the vehicle manufacturer if you have
any questions.

• S4: Suitable for a wall thickness of 26 mm up to max. 53 mm
  For wall thicknesses of under 26 mm, you must put the inner frame underneath. For wall thicknesses of 27 – 53 mm, you must place the spacer strips between the inner and outer frames
  
  
• S7: Suitable for a wall thickness of 22 mm up to 44 mm (S7,S7P) and 28 mm up to 42 mm (S7Z) Window can be adjusted to different wall thicknesses through corresponding clamps