This is a mould for making a silicone sock when using an airbrush nozzle for 3D printing. To use it: lightly coat the walls of the moulds with a thin layer of vaseline and. Then fill the nozzle section of the mould with a layer of heatproof silicone kit in the mould (both moulds). This is the part before the hex. Then put in the nozzle and close the mould. Remove excess rubber and let it cure. Remove from mould and clean it off.