First Instruments Sdn Bhd (Private sector)

Unit 603 Blk D Phileo Damansara 1 Jln 16/11 Off Jalan Damansara Petaling Jaya

46350 Selangor Darul Ehsan

Malaysia

Phone: +60376652166

Fax: +60376652199

One Gasmaster Sdn Bhd (Government sector)

No. 18, Jalan PJU 3/48, Sunway Damansara Technology Park

47810 Petaling Jaya, Selangor

Malaysia

Phone: +603 78850202

Fax: +603 78859545