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Welcome to - Custom Source for the Hobby Caster!
Welcome to - Custom Source for the Hobby Caster!


Sierra Series

Sierra series tube-in silicone molds cast two tubes for the following kits:
  • Sierra Twist BP kit
  • Sierra Vista pen kit
  • Apprentice Classica Twist BP kit
  • Gatsby Twist BP kit
  • Wall Street II Twist BP kit
  • Elegant Beauty Twist BP kit
  • Lancer Twist pen kit 
  • Mesa Twist pen kit 
  • Virage Twist pen kit 
  • PSI Art Deco Twist Pen Kit 
  • PSI Magnum Twist Pen Kit
  • PSI Majestic Squire Twist Pen Kit
  • PSI Nouveau Sceptre Twist Pen Kit
  • PSI Bolt Action (30 Cal) BP Pen Kit
  • Artisan Aero pen Pen Kit
  • PSI Gearshift Pen Kit
  • PSI Steampunk Pen Kit

Most tube-in series are universal in nature, if the tube length is close and bushings are the same size or smaller, then the tube-in blank should cast properly.  Please visit IAP Kit Bushing and Tube Reference for various pen kit dimensions.

Initial set of stoppers are included with a mold purchase. CLICK HERE to buy replacements.



Blue molds except Gisi Style Molds cast Polyester Resin (Silmar 41), Urethane Resin (Alumilite Clear), and Epoxy Resin.

Mold release sprays help to extend the shelf life of our molds. We recommend Stoner Thermoset for Polyester and Epoxy Resins, and Stoner Urethane for Urethane Resin.

Please contact us or visit our Casting Basics Guide for more information on mold casting.

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    • Sale
      Original price $ 56.55
      Current price $ 49.75

      Sierra Series Special


      TUBE-IN ROLLING JIG IS SOLD SEPARATELY for those who want to purchase multiple specials without duplicating this tool! The Sierra Series Special in...

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      Original price $ 56.55
      Current price $ 49.75
    • $ 47.00

      Sierra Series 4.0


      BUNDLE AND SAVE: Alumilite 4.0 Tube-in Mold Bundle includes the 4.0 series tube-in mold of your choice, initial stoppers, 2 pounds of Alumilite Cle...

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      $ 47.00
    • $ 30.00

      Sierra Series - Silicone Mold


      BUNDLE AND SAVE: Sierra Series Special includes the series mold, initial stoppers, and 9 label sizing templates associated with the mold for $49.75...

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      $ 30.00
    • $ 1.00

      Sierra Series Stopper Replacement - Full Set


      Set of (4) replacement stoppers (plugs) for the initial sets of stoppers that come with the following mold series: Cigar Sierra Sierra Click Zen P...

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      $ 1.00
    • $ 2.95

      Label Sizing Templates - Individual


      TWO-FER LABEL SIZING TEMPLATE BUNDLES upper and lower templates for any of our two barrel pen kits offered for only $5.49! THREE-FER LABEL SIZING T...

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      $ 2.95
    • $ 14.95

      Tube-in Rolling Jig


      AKA Label Wrap Holder - useful jig to assist casters in wrapping labels, or other thin materials, to brass pen tubes. This jig has been designed an...

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      $ 14.95