10 Layer rigid-flex PCB  made by Storm Circuit 
PCB layers:10 layers
Material:FR4+PI                                                                          
Thickness:1.6mm   +0.2mm                                                       
Min track/space:0.13/0.13mm       
Immersion Gold                                                                 

Large flex PCB with stiffener
524.64*399.14mm
400 pcs LED loading on each PCB
2 Layer FPC
0.2mm thickness

0.2mm
Flex PCB 
Stiffener with 0.3mm thickness

4 layer rigid-flex PCB made by Storm Circuit

FR4+PI

1.6mm+0.2mm

Inner layers are Flex part

2 Layer FPC   
Thickness 0.2mm    
min trace/space 0.1/0.1mm   
 FR4 stiffener total thickness 0.8mm
Storm Circuit loaded components too

2 layer rigid-flex PCB with 1.2mm
FR4+PI
1.2mm+0.1mm
Stiffener

4 layer
Flexible PCB
0.25mm
Stiffener

4 layer rigid-flex PCB
FR4+PI
1.6mm+0.2mm

2 layer Flexible PCB 
Quick turn in 3 days
FR4 1.0mm +PI stiffener
Gold fingers
Impedance
trace/space 0.1/0.1mm

4 layer rigid-flex PCB
3*4 pcs/panel
FR4+PI
1.6+0.2mm
Inner layers are flex part

2 layer rigid-flex PCB
1.6mm+0.1mm

2 Layer FPC with hard gold plating 30U''