# Selection and Sizing

- [Aftermarket or genuine: which construction machine part should you choose?](https://test.yznismakineleri.com/en/aftermarket-heavy-equipment-part-vs-genuine): 2026-10-27 — A genuine part is the machine manufacturer’s own part. An aftermarket part is made by another company to the same OEM number. The right choice depends on the part, the age of the machine and its warranty status.
- [What information should you give when asking for a quote on construction machine parts?](https://test.yznismakineleri.com/en/heavy-equipment-spare-parts-quote-information): 2026-10-27 — A few details are enough for an accurate quote: the make and model of the machine, the serial number, the part’s OEM number and the quantity. Add a photo and the risk of the wrong part arriving drops even further.
- [What is the OEM number on a construction machine part, and where do you find it?](https://test.yznismakineleri.com/en/what-is-oem-number-construction-equipment-spare-parts): 2026-10-26 — The OEM number is the part’s reference number at the machine manufacturer. Most of the time it is on the part itself, in the parts catalogue or on an old invoice. It is also the first thing we ask for when you request a quote.

Source: [https://test.yznismakineleri.com/en/blog-selection-and-sizing](https://test.yznismakineleri.com/en/blog-selection-and-sizing)