Champion
manufactures a complete line of takeoffs for residential or light
commercial applications. The last dimension in the
description is the collar size. Each takeoff has a
consistent cut out dimension and all round fittings have divider
points on the back of the base for easy setting of hole cutters.
"Rise" of takeoffs when installed: 572 - 3/4"; 575
- 1 1/4; 568 - 1 1/4"; 577 - 1 7/8"; 577 w/1/2 tab - 1
7/8"; 577 QT - 1 1/4". 502 & 503 start collars
have a length of 2" when installed.