Image credits

Every picture on this site that is not our own work is listed here with its title, author, source and licence, and the pages that show it. Our drawings are our own, drawn from the dimensions each page cites.

Photographs from Wikimedia Commons 1

Each is used under the licence named, which links to its terms, and is credited where it appears. They are resized, never cropped or otherwise altered.

	Title, author, licence and source	What it shows	Shown on
	“Filtro olio avvitabile” by Elwood, public domain, via Wikimedia Commons (resized)	A typical spin-on filter — not necessarily this part.	Spin-on hydraulic filters: 42 part numbers with specs, 0080MA003P HYDAC 3 micron spin-on hydraulic filter: specs, 0080MA005BN HYDAC 5 micron spin-on hydraulic filter: specs and 40 more

A picture is removed or its credit corrected on request; how this site is built and sourced is on the methodology page.