What is the maximum weight that a trampoline can support?

Not sure about the maximum weight our trampolines can support ?

For trampolines between 180 cm and 250 cm in diameter :

• Maximum weight supported without anchoring kit : 50 kg
• Maximum weight supported with anchoring kit : 100 kg 

For trampolines between 305 cm and 490 cm in diameter :

• Maximum weight capacity of 100 kg without an anchoring kit
• Maximum weight capacity of 150 kg with an anchoring kit

But what is an anchoring kit ? (click on the image for more information)