Inquiry (采购产品): Model 1410 How often do you need to calibrate Model # 1410 with serial Number 57104? What is the manufactures tolerances for this equipment + or – per feet? Would someone be able to call me an answer a few questions next week. (510) 933-2500. **** Hidden Message ***** Peter Fraser 3481 West Warren Fremont , CA 94538 USA Company: Oakland Valve & Fitting CO. Phone: 510-933-2500 E-mail: pfraser@swagelok.com **** Hidden Message ***** pfraser@swagelok.com