There are 4 different size hole:
16mm
12mm
10mm
8mm
Application:
650nm red laser module suitable size
635nm red laser module diode suitable size
532nm green laser module diode suitable size
520nm green laser module diode suitable size
450nm-455nm blue laser module diode suitable size
Any other laser module lazer diode suitable
Package content:
1x laser module diode bracket seat
Shipping:
To USA by E-packet
To other countries by China post air mail
Thanks for your time!
Happy Shopping!