MO20.5 - MO20.5G
Shares a similar construction to the M016. The leaf retaining slots are milled through the body, so precluding face mounting holes. Compared to the MO16 he number of leaves is increased to 12 producing a more circular aperture.

Two types of actuator are available; the handle (MO20.5) and gear ring (MO20.5G). Both the handle and the gear ring can be modified to customers specification.
standard iris M020.5 
Aperture
Max 	-	 11.0 mm
Min 	-	 1.0 mm

Construction
Body	-	Brass
Cover	-	Brass (Spring Retained)
Leaves 	-	12 Tempered blued steel 
			/ Stainless Steel
Finish	-	Black Stove Enamel
Pin Length - 	7.5 or 10 mm ( Detachable )
Mounting   -	Tube

Gearing details (MO20.5G only)
MOD	-	.5
Teeth	-	64
O/D	-	33 mm
Thickness - 	5 mm
20 PA
Detailed diagram
Wilkes Iris Ltd | Widco Works | Bexhill | England | TN39 3LE | +44(0) 1424217630 | wilkes-iris.com