{"product_id":"assorted-rubber-stopper-set-30-piece-sizes-000-12-solid-amp-1-hole","title":"Assorted Rubber Stopper Set — 30-Piece, Sizes #000–#12, Solid \u0026amp; 1-Hole","description":"\u003cp\u003e\u003cstrong\u003eA complete rubber stopper set is the connective tissue of a chemistry lab — every flask, tube, and bottle needs one, and having the right size on hand is the difference between a working experiment and a frustrating delay.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNatural rubber resists distortion and cold flow, maintaining a gas-tight seal over repeated insertions. The set covers the full range from tiny 16mm test tubes (#000) to 1000mL Erlenmeyer flasks (#12), with both solid stoppers (for sealing) and single-hole stoppers (for thermometers, gas inlets, or tubing). All stoppers are autoclave-compatible at 121°C.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e30 stoppers — 15 solid + 15 single-hole; sizes #000 through #12\u003c\/li\u003e\n\u003cli\u003eNatural rubber — autoclave compatible (121°C); resists dilute acids\/bases\u003c\/li\u003e\n\u003cli\u003e1-hole stoppers accept 4–8mm glass or PTFE tubing\u003c\/li\u003e\n\u003cli\u003eStored in reusable zipper case; sizing chart included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eEvery purchase directly funds independent physics research at the Golden Physics Project.\u003c\/em\u003e\u003c\/p\u003e","brand":"Golden Physics Project","offers":[{"title":"Default Title","offer_id":54144336789796,"sku":"GPP-LAB-STOPPERS30","price":29.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1007\/2879\/9524\/files\/0f72dbeb87f944efe48d6ca4bc4877d98957260d_880x700_e5af61e4-b1b4-43f7-ac8d-9fb0c1b9ddc2.jpg?v=1780993259","url":"https:\/\/shop.goldenphysics.org\/products\/assorted-rubber-stopper-set-30-piece-sizes-000-12-solid-amp-1-hole","provider":"Golden Physics Project","version":"1.0","type":"link"}