90030 (B-18 / pack of 4)TRADITIONAL ABS I BEAMS Use for horizontal or diagonal members in the construction of most steel structures. Precision Injection Molded in Dark Gray ABS Plastic. Ideal for all outdoor or professional model construction where model life is critical. High impact characteristics provide durability, flexibility and longevity of the model.

or Fabricated from other Plastic Materials

packaging and project summarization are included in a 7 page instruction packet within the Pack

x 4-1/8"(105mm) axle 2 3/32Ó (2

1 16 Tooth pinion

EXPANDED URETHANE FOAM

Ideal for all outdoor or professional model construction where model life is critical

liquids or air

Multi-ratio gearing system in a clear Polycarbonate frame provides adjustable power for unlimited uses

Precision injection Molded in ABS Plastic

Use for glass columns or where clear or painted square stock is appropriate

Written for upper level education

Developed in a format to give hands-on learning of design modeling