Panasonic PT-RS20K Operating Instructions Manual page 251

Chapter 7 Appendix — Precautions for attaching the Ceiling Mount Bracket
r Specification for the screw holes to fix the projector (projector bottom view)
Unit: mm
110 (4-11/32") 145 (5-23/32")
110 (4-11/32")
135 (5-5/16") 145 (5-23/32")
ENGLISH - 251