peter.king@LIGO.ORG - posted 12:26, Friday 13 February 2015 (16720)
H1 PSL Enclosure distances
distance from the PSL table to the acoustic enclosure wall = 4' 10-11/16"
distance from acoustic enclosure wall to periscope face plate = 2' 9"
The face plate is labelled as IO ALS M5.