Joe Shun-I-Tee, etc. 
 http://www.wzqiaoshun.com/1007.htm 
 I type so Tee 
 Product Code Nominal diameter (mm) Product diameter (mm) on standard series (mm) 
 I001 15 16 15.88 
 I002 20 22 22.22 
 I003 25 28 28.58 
 I004 32 35 34 
 I005 42 42 42.7 
 I006 54 54 48.6 
 I007 76 76 76 
 I008 89 89 89 
 I009 108 108 108 

 Series: compression type plumbing fittings http://www.wzqiaoshun.com/shuinuanguanjian.htm 
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