GP-153 Short Knockout Impinger, (M23 & M202)
The GP-153 Short Knockout Impinger with #28 ball joints comes with silicone and Teflon™ coated O-rings, standard. Used in Method 202 and Method 23 glassware trains.(click on image to enlarge).
Precision Made Ground Glass
#28 Ball & Socket Joint
Accommodates XAD Trap