This diamond shaped red pin is a part of the Disneyland California Adventure W.E.B. Periodic Elements Set . Written on the pin is "WEB SLING // C Carbon Re Rhenium W Tungsten WORLDWIDE ENGINEERING ENGINEERING BRIGADE " in light grey with a red background.
The reverse of the pin is silver and has impressed mickey heads. On the back of the pin is written "MARVEL ©MARVEL ©Disney MADE IN CHINA FAC-073364-19214 ". The rear of the pin has one post and two nubs.