Write the system details factories need
A platinum cured request has to carry inner and outer diameter, wall thickness in inches or millimetres, medium, service temperature in °F or °C, quantity by configuration, destination and the documents that travel with the lot. If peroxide cured is acceptable as an alternative, say so in writing. If it is not, say that too.
Wall thickness decides whether an offer is usable
A unit price without wall is not a competitor. Collapse, fitting grip and flow all move when wall changes. If a supplier proposes a different wall, re-issue the line. Do not accept “close enough to platinum cured” as a verbal upgrade.
Evaluate a supplier-proposed alternative on the same axes
A neighbouring string such as medical grade silicone tubing or reinforced silicone tubing may be the same extrusion or a different construction. Ask which of ID, OD, wall, Shore A, tensile strength in MPa or psi, and the named ASTM method changed. Keep the original line on file.
Compare total procurement cost, not a factory slogan
Packing, Incoterms, sample versus production split and document set belong next to the money figure. This desk will not recast a cheaper-looking number on a different Incoterm as a percentage saving. Comparison is of the same quantity, packing and file set.
What we send, and what we do not claim
We forward the same written list to more than one factory. We do not claim a factory identity, an authorization, or a warehouse. Samples, if requested, stay a buyer and supplier agreement. Drawings can follow the first reply; the form has no upload field.