GAUGING TAPES ARE VERIFIED ACCORDING TO THE API'S MANUAL OF PETROLEUM MEASUREMENT CHAPTER 3.1.A. WHICH REQUIRES THAT FIELD TAPES BE VERIFIED WHEN NEW AND ONCE A YEAR THEREAFTER . SELECT A BOB FROM THE PLUMB BOB SECTION IN THIS CATEGORY. THE PLUMB BOB AND TAPE ARE CONSIDERED A "SYSTEM" AND ARE SCRIBED WITH THE SAME SERIAL NUMBER. TAPE AND BOB COME COMPLETE WITH A CERTIFICATE. LABOR IS BILLED SEPARATELY FROM THE COST OF THE TAPE AND BOB, DEPENDING ON THE LENGTH OF EACH TAPE.THE TOTAL PRICE OF THIS ITEM IS THE COST OF THE TAPE PLUS THE PLUMB BOB YOU SELECT PLUS A LABOR CHARGE. THE PRICE OF LABOR VARIES DEPENDING ON THE LENGTH OF THE TAPE.
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