THE ULTIMATE GUIDE TO MEGA25

*This clause doesn't use to Pre-owned & Refurbished goods.  A. Product is defective when you receive it, inside 14days of delivery, you can return defective products to Elegoo and get an entire refund or substitution, and Elegoo is chargeable for return transport costs. Or you can check with Elegoo to repair defective goods, and Elegoo is li