- 1997 Incorporated in Rojana Industrial Estate
- 1997 Granted BOI Privilege Certification
- 2002 Awarded ISO 9001:2000 Certification
- 2004 Increase Capital to 250 MB
- 2005 Listed in the Stock Exchange of Thailand
- 2007 Awarded ISO 14001 Certification
- 2011 IATF 16949 Certification
- 2018 Changed Head Office to Singburi Factory
- 2018 Changed Name to SPEN
- 2019 To Better Continue...
Manufacturing Capacity