IDENTIFY
Start with machine model, serial or product identification number, engine model and installed filter reference.
A useful availability enquiry contains enough evidence to separate a visual match from a responsible cross-check.

Start with machine model, serial or product identification number, engine model and installed filter reference.
Compare dimensions, thread, gasket, valve arrangement, media duty and any supersession information available.
Confirm reference, quantity, condition, commercial terms and collection or delivery arrangement in writing.
Protect filters from moisture and crushing, label by machine or service pack and retain the confirmed record.
Add the evidence you have. A part number is best; accurate dimensions and photographs can support investigation where markings are missing.
