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Basically it's a borosilicate glass 3.3 vial we've run through hundreds of batches—HPLC and MS on every one, and we usually have stock on 5ml and 10ml but the 3ml and 7ml can take 20 days or so if it's a custom run. 2. We do 3ml, 5ml, 7ml, and 10ml, flat neck at 16mm or 22mm, and closure is an alumnum cap with PTFE/silicone septum—it's pretty much airtight for retatrutide or any peptide you're handling, though don't use it for aggressive solvents like concentrated acids because the glass is clear and that's fine for most labs. 3. Most buyers go with the 5ml for single-dose vials, and the 10ml if they're pooling multiple injections; the 16mm neck is easier for automated filling, but if you're manual, the 22mm gives you more clearance anyway. 4. We've had one issue where the septum gets a bit stiff if stored below 10°C for months, but (check our lead time) we usually ship within 10-14 days for standerd orders and include COA and TDS with every shipment. 5. MOQ is 20,000 pieces for customiztion on size or labeling, otherwise bag-packed with 100 per inner box and 10 boxes per carton—just send me your spec sheet and I'll quote you on the 5ml or whichever you need first.
