{"product_id":"rubert-521-precision-reference-specimen-type-b-sawtooth-wave-ra-0-4-m-15-in","title":"Rubert 521 | Precision Reference Specimen | Type B, Sawtooth wave, Ra = 0.4 µm (15 µin)","description":"\u003cp\u003eWith RSm = 15 µm, Pt = 1.6 µm and Ra = 0.4 µm (15 µin), the Rubert 521 is a sawtooth wave precision reference specimen classed as ISO 5436-1 type B. Laboratories use it for checking and calibrating surface measuring instruments. It is offered in two versions: 521E, with a hard nickel-boron top layer, and 521X, without a top layer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey features\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eISO 5436-1 type B, sawtooth wave profile\u003c\/li\u003e\n\u003cli\u003eRSm = 15 µm, Pt = 1.6 µm; Ra = 0.4 µm (15 µin)\u003c\/li\u003e\n\u003cli\u003eElectroformed nickel; 521E with hard nickel-boron top layer or 521X without\u003c\/li\u003e\n\u003cli\u003eUKAS calibration available on request from Rubert's accredited laboratory\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Rubert","offers":[{"title":"521E – nickel-boron top layer","offer_id":67656283160689,"sku":"521E","price":0.0,"currency_code":"AED","in_stock":true},{"title":"521X – no top layer","offer_id":67656283193457,"sku":"521X","price":0.0,"currency_code":"AED","in_stock":true}],"url":"https:\/\/www.generaltechshop.ae\/products\/rubert-521-precision-reference-specimen-type-b-sawtooth-wave-ra-0-4-m-15-in","provider":"General Tech Services LLC","version":"1.0","type":"link"}