GP-153 Short Knockout Impinger (M202 & M23)
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