Smojo blocks smoking materials and ash.
Smojo is made of surgical quality stainless steel and cannot be burned with a standard lighter. This steel has been extensively studied and is safe if used as directed. Do not touch Smojo when it is hot. (Smoking is known to cause a variety of health problems.)
Please check Smojo Fit Guide:
The 2 things to check are the size of the hole and the clearance beneath the hole. If you have a set of drill bits, if the 1/8" drill bit slides through the hole at the bottom of your pipe to a depth of 3/8", Smojo should fit. If the 1/8" drill bit will not slide through the hole there is little hope that Smojo will fit. Another test is to take several paperclips (normal not jumbo size) , straighten them out, and see how many can fit in through the hole at the same time, 4 is marginal, 5 or more and Smojo should fit.