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Inner and outer diameter on one line Wall thickness in inches or millimetres Grade files belong to the quoted item

clear plastic tube

The shortest clear plastic tube request a factory can still quote from names one size line: inner diameter, outer diameter, wall thickness in inches or millimetres, resin intent, quantity and destination. Wall thickness has to be fixed before the request is sent; “standard wall” is not a number. Quantity-driven repeats belong on one repeating line; one-off prototypes belong on a separate sample line.

1. Lock the size line

Write ID, OD and wall together. Clarity is a visual ask, not a substitute for resin. If only a photo exists, say so; a photo is a starting point, not a specification. Color or frost can wait unless the drawing already locks optical grade because pigment can shift density in g/cm³.

2. Separate stock length from finished cut

Coil or stick length belongs on the line when the plant ships stock. Cut-to-length pieces need the finished length and tolerance. Do not let a salesperson convert a competitor part number into “close enough” without those axes in writing.

3. Issue the same brief to more than one plant

Plastic Tube Sourcing copies the same clear plastic tube line to factories that can answer that form. We do not rewrite wall thickness to match a leftover catalogue. Comparison is of packing, Incoterms, sample split and documents—not a claimed market discount.

4. Read the offer against the request

An offer that names neither the inquiry form nor the ID/OD pair is a number without a product. Send it back. The reading-quotes note lists the return fields. Application context lives on the clear polycarbonate plastic tube uses page when impact or heat deflection temperature (HDT) is actually on the drawing.