2.25" ID X 2" ID

This compact reducing coupler is ideal where clearance is minimal - no hump to get in the way. One end goes on 2-1/4" OD tubing, the other end goes on 2" OD tubing.
Temp rated at 250-275F.

Made in USA. 

Recommended clamps are 94100-0262 on the big end and 94100-0238 on the small end.