Custom Precision Optical Slits or Pinholes,Stainless Steel Material $20.00 VIEW THIS ITEM Item condition: New Ended: Mar 21, 17:30 PST Material:Stainless Steel Diameter:9.5mmThickness:0.05mm or customizedSlit length:3mmWidth:25um-1000umDimension Tolerance:±10%Pinholes...
ball and ring physics chemistry thermal heat demonstration apparatus equipment $5.00 VIEW THIS ITEM Bids: 0 Item condition: Used Ended: Jul 6, 10:51 PST This is a nice ball and ring apparatus used for showing thermal expansion in science education Popular Video...