{"product_id":"metal-shim-set-m42-m48-m54","title":"M54 Metal Shim Set","description":"\u003cp\u003ePrecision metal shim set for setting precise backfocus of critical optical systems.  Fits M54 threads.  (M42 and M48 sizes also available.)  Each shim is etched to indicate the thickness.  No need to dig out the calipers if you mix them up!  Included sizes:\u003c\/p\u003e\n\u003cp\u003e0.1mm\u003cbr\u003e0.15mm\u003cbr\u003e0.2mm\u003cbr\u003e0.3mm\u003cbr\u003e0.4mm\u003cbr\u003e0.5mm\u003cbr\u003e0.6mm\u003cbr\u003e0.7mm\u003cbr\u003e0.8mm\u003cbr\u003e1.0mm\u003c\/p\u003e","brand":"Dark Matter Optics","offers":[{"title":"Default Title","offer_id":50307923640577,"sku":"ShimSetM54","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0327\/2569\/6648\/files\/c8c8e83b-d2d7-4198-b3da-ea97506a4655.png?v=1789098128","url":"https:\/\/starizona.com\/products\/metal-shim-set-m42-m48-m54","provider":"Starizona","version":"1.0","type":"link"}