BSP Thread gauges are the British standard Pipe Parallel thread gauges with 55° thread angle. At gaguestools, all the BSP gauges are manufactured according to ISO228 Standard. Each gauge is having a low price with 100% quality assurance. All our gauges are used directly. We will be delivered our produced within 3-5 days by express. https://www.gaugestools.com/bsppg-thread-gauges/