O-ring sizes for TWINAMP

#1. between PVDF frame and Al box
#2. between Al box and 2nd plate
#3. between 2nd plate and PVDF plate
#4. between PVDF plate and window

For Short tube: window size 75 x 40 x 5.1
#1. 60 x 2
#2. 120 x 2
#3,4. 64 x 2 (if the opening on the end plate and PVDF is 65)
60 (or 62) x 2 (if the opening on the end plate and PVDF is 60)

O-ring between reservoir and PVDF fram: 410 x 4
O-ring between PVDF reservoir and upper ground plate: 400 x 4

For Long tube: window 100 x 50 x 10

#1. 85 x 2
#2. 125 x 2
#3,4. 85 x 2