Kawaii Creative DIY Epoxy Resin Casting Mold Pen Shaped Ruler And Angular Gauge Shaped Resin Mold, Including Ruler And Angular Gauge DIY Epoxy Resin Casting Mold Process, DIY Resin Craft Production Kit - Used For Ballpoint Pens, Silicone Pen Molds, Red, Black And Blue Ballpoint Pen Cores, DIY Resin Casting Molds, Pen And Ruler Protractor Production