Granite table calibration Services Singapore by OPUS We offer granite lapping services including calibration services Calibration report traceable to ISO/IEC 17025 Singlas Standard Can’t find the instruments you want here? Do not worry. You can always either drop us an email or contact us through the information below. Email : ericsalescalibration@gmail.com HP : +65 9018 9084 (Mr. Eric Chuar)