klein — as the name suggests, is a take on the classic klein bottle concept. it is a dexterity puzzle with a metal ball inside.– the task is extracting the ball from the bottle.difficulty: 8 on 10size: 60 x 60 x 80 mmmaterial: 3D printed resin, finished with glossy lacquer & resin based paint.listing price is exclusive of shippingtimeline: this is a pre-order listing. i will require 6 weeks to manufacture the batch and ship.cheers!