1, Printed a model about Halloween
2, Post in Facebook or Instagram or Twitter #Halloween and @longer3dprinter
3, Everyone joins this contest, get 1kg free PLA filament or LK5 pro 35% off (about $110) coupon code(30 units only) 4, This contest end Oct 30 5, We will collect fans who join in this page. PS: This contest only for USA, Euro and Russia customers