supply of tyre defect gauge , tyre defect gauge for broad gauge coaching stock conforming to irca part iv, rule 2.8.4 an d plate 38, suitable for checking wheel defects such as thin flange, sharp flange, deep flange, hollow tyre/fa lse flange, root radius, and wheel tread flatness up to 50 mm rejection limit and thin flange up to 22 mm re jection limit. the gauge shall be made of hardened alloy steel or stainless steel with permanent laser-etche d markings indicating rolling stock type and measurement parameters. the gauge shall have a robust yet li ghtweight handheld construction suitable for field/depot use, with a thickness of approximately 3.0-3.5 mm and a weight of approximately 300 g. each gauge shall be supplied complete with a durable carrying case, a belt holster, and a valid calibration certificate issued by an nabl-accredited or government-approved cali bration laboratory. accepted make/model: pie tdg-1 or equivalent reputed oem conforming to indian railw ay standards [ warranty period: 30 months after the date of delivery ] ]