3-in-1 Weather Station, 5.12" Diameter Item Type_Springs this enhanced optical bench set

this enhanced optical bench set ships with a lamp housing and a matched complement of optical components

and tin specimens in a snap-top case for comparative mass-volume calculations

Aluminum-bodied double-parallel pulley with two 2-inch wheels in a heavy-duty 4

Four-point-five-ohm 9A standard rheostat with constantan winding on a vitreous-enameled steel tube

rated autoclavable and chemically durable to 135 °C

3-in-1 Weather Station, 5.12" Diameter Item Type_Springs this enhanced optical bench setThree in one weather station on a 5. 12 inch analog dial combining a thermometer, barometer, and hygrometer in a single classroom scale unit for monitoring room conditions at a glance.