{"product_id":"premium-food-grade-silicone-aquarium-gasket-standard-widened-flat-washer-for-bulkhead-fittings-rohs-compliant-seal","title":"Premium Food-Grade Silicone Aquarium Gasket  Standard \u0026 Widened Flat Washer for Bulkhead Fittings  ROHS Compliant Seal","description":"\u003cdiv style=\"background-color: #f8f9fa; padding: 10px; border-left: 4px solid #17a2b8; margin-bottom: 20px;\"\u003e\u003cp style=\"margin: 0;\"\u003e\u003cem\u003e🔄 Looking for the fittings to match these seals? Check out our full range of \u003cstrong\u003e\u003ca href=\"https:\/\/atradesen.com\/products\/upvc-double-internal-thread-tank-bulkhead-12-1-fpt-x-fpt-water-tank-adapter-aquarium-rain-barrel-connector?_pos=3\u0026amp;_sid=d2e2e0696\u0026amp;_ss=r\" style=\"color: #17a2b8; text-decoration: underline;\"\u003eHeavy-Duty UPVC Tank Bulkheads\u003c\/a\u003e\u003c\/strong\u003e.\u003c\/em\u003e\u003c\/p\u003e\u003c\/div\u003e\u003ch2\u003ePremium Food-Grade Silicone Aquarium Gasket\u003c\/h2\u003e\u003cp\u003eEnsure a 100% watertight seal on all your custom plumbing projects with our Premium Silicone Gaskets from \u003cstrong\u003eAtradesen.com\u003c\/strong\u003e. Specifically designed for aquarium bulkheads, water tanks, and threaded joints, these high-elasticity flat washers drastically outperform standard rubber seals, offering maximum leak protection and longevity without hardening over time.\u003c\/p\u003e\u003ch3\u003e🌟 Superior Sealing \u0026amp; Safety\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eROHS Food-Grade Silicone:\u003c\/strong\u003e Manufactured from environmentally friendly, food-grade silicone. 100% non-toxic, odorless, and perfectly safe for sensitive marine reef tanks, freshwater aquaculture, and drinking water reservoirs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard vs. Widened Design:\u003c\/strong\u003e Choose the \"Standard Type\" for regular slim fittings, or upgrade to the \"Widened Type\" which provides a massive surface contact area—ideal for securing slightly uneven drill holes, chipped glass edges, or extra-thick panels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eB2B Customization Available:\u003c\/strong\u003e Need a special dimension for an industrial project? We accept custom manufacturing orders! Please contact Atradesen B2B support for details.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003e🚨 Sizing \u0026amp; Special Fitment Warning (Crucial!)\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eOur sizes are listed as: \u003cb\u003eInner Diameter (I.D) × Outer Diameter (O.D) × Thickness\u003c\/b\u003e. Please read the Atradesen.com fitment rules carefully:\u003c\/p\u003e\u003cul style=\"background-color: #f8d7da; padding: 15px 15px 15px 35px; border-radius: 5px; color: #721c24; border: 1px solid #f5c6cb;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e⚠️ 46mm \u0026amp; 58mm (1.5\" \/ 2\") RESTRICTION:\u003c\/strong\u003e Due to international thread standards, the gaskets with 46mm and 58mm inner diameters are designed to slip over \u003cb\u003eMALE THREADS ONLY\u003c\/b\u003e. They are NOT suitable for slipping directly over bare 50mm or 63mm PVC pipes! (All other sizes have no such restriction).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasurement Tip:\u003c\/strong\u003e Always measure the precise Outer Diameter (O.D) of your bulkhead's male thread to select the correct gasket Inner Diameter (I.D).\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Atradesen","offers":[{"title":"Standard 20*30*2mm \/ Pack of 10","offer_id":56349944381606,"sku":"Filter_Material_001","price":3.18,"currency_code":"USD","in_stock":true},{"title":"Standard 20*30*2mm \/ Pack of 50","offer_id":56505245892774,"sku":null,"price":8.96,"currency_code":"USD","in_stock":true},{"title":"Standard 20*30*2mm \/ Pack of 100","offer_id":56505245925542,"sku":null,"price":12.85,"currency_code":"USD","in_stock":true},{"title":"Standard 25*35*2mm \/ Pack of 10","offer_id":56349944578214,"sku":"Filter_Material_007","price":3.24,"currency_code":"USD","in_stock":true},{"title":"Standard 25*35*2mm \/ Pack of 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