< td> Browse Catalog [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] ... Igneous Rock Collection Contains 15 representative specimens of intrusive and extrusive igneous rocks, each approximately 11/2" x 11/2". - For Age 6+Yrs Igneous Rock Study Kit This smaller version of our most popular large rock kits contain 1"X1" igneous rock specimens - For Age 6+Yrs Introductory Rock Collection Provides a primary presentation of the basic rock types. Includes five each of igneous, sedimentary and metamorphic rocks, totaling 15 specimens, approximately 1 1/2" x 1 1/2". - For Age 6+Yrs Knife Switch - Double Pole, Double Throw KNIFE SWITCHES w/Plastic Base - For Age 6+Yrs Knife Switch - Single Pole, Double Throw KNIFE SWITCHES w/Plastic Base - For Age 6+Yrs Light bulb Holder - plastic disc. Holds standard screw type flashlight bulb. - For Age 6+Yrs Light Socket - plastic Mini plastic socket with screw type binding post. - For Age 6+Yrs Light Socket - Porcelain Mini porcelain socket with screw type binding post. - For Age 6+Yrs Lung Apparatus Used to demonstrate how the lungs are emptied and filled with air by relaxation and contraction of the diaphragm muscle. - For Age 6+Yrs Browse Catalog [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [21] [26] [28] [29] [30] [31] [32] [33] [34] [35] [37] [41] [42] [43] [44] [45] [46] [47] [48] [49] [50] [51] [52] [53] [54] E-commerce powered by MonsterCommerce shopping cart.