This is true X 155mm main plate, designed for 4 inch props and 220X motors. Extremely light but still quite durable.
Compatible with all standard sized pods(30.5X30.5). Excellent choice is Armattan Uni POD http://www.armattanquads.com/armattan-uni-pod/
Compatible with piko blx flight controller (20X20 mount).
Thickness - 4mm.
Weight ~31g.
2mm ~ 1 gramm
3mm
17g
19g
2mm
1g
4g
3.2mm holes
2.1mm holes