The Evergreen StripStyrene Plastic I Beam 0.312 from the plastic building materials range provides a set of high quality plastic I beams ideal for adding detail to your models, scratchbuilding and architectural models. Length: 14" (350mm) Imperial Dimensions: 0.312" (5/16") Metric Dimensions: 7.9mm Pieces per Pack: 2 Manufacturer: Evergreen StripStyrene Model: EG278 Plastic I Beam 0.312