These blade comes in:

Hybrid aluminum:  This new and improved blade has more
strength and causes less flex, which will improve the handling of
your boat.  This is the strongest blade available.  The thickness
of the blade is the same, the only change is the material.

Total length of rudder is 6 and 5/16 inches.
Rudder width is 1 and 1/4 inches.

The 2 oversize water passages (1/8 inch) are used to cool the
engine and the exhaust system simultaneously.
DPS-100 and DPTR-100
Dual Pickup Straight Rudder Blade

and
Dual Pickup Tapered Rudder Blade
(hybrid aluminum)