{"product_id":"polarstar-gearbox-shim-set","title":"PolarStar Gearbox Shim Set – Cylinder Conversion","description":"\u003cp\u003ePolarStar Gearbox Shim Sets for cylinder conversion kits. Used to properly fit the cylinder within the gearbox shell. Available in two thicknesses — select based on your gearbox shell dimensions.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e.152\"\u003c\/strong\u003e — standard thickness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e.157\"\u003c\/strong\u003e — slightly thicker for tighter gearbox shells\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PolarStar","offers":[{"title":".152\"","offer_id":45868783566882,"sku":"10001161","price":4.9,"currency_code":"USD","in_stock":true},{"title":".157\"","offer_id":45868783599650,"sku":"10001162","price":4.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0741\/5355\/8050\/files\/ChatGPT_Image_Jun_19_2026_10_26_41_PM_5.png?v=1781933218","url":"https:\/\/www.katechairsoft.com\/products\/polarstar-gearbox-shim-set","provider":"KA Tech Airsoft ","version":"1.0","type":"link"}