20m Fiberglass Tape Measure with PVC Cover and Winding Handle Type_Tall Form 75-inch metal bell in a

75-inch metal bell in a plastic shroud

Molded black plastic replacement knob sized for the goggle sanitizer cabinet timer switch

Polished non-warping wooden base with a built-in meter-scale carries a compass-box magnetometer

Sodium chloride lattice kit with 27 color-coded gray and green atoms plus 54 connectors for building the full cubic NaCl crystal structure in three dimensions

High grade

20m Fiberglass Tape Measure with PVC Cover and Winding Handle Type_Tall Form 75-inch metal bell in aFor field surveys, outdoor physics activities, and long distance laboratory exercises, this twenty meter fiberglass tape measure carries a non conductive waterproof PVC coating.