Behind the details

Start with the source.

Every guide draws on our own product catalog: kit names, options, sizes, prices and photos, dated on the day they were recorded.

What the sources can tell you

Catalog records help identify products and the options a seller lists. They do not independently verify performance, installation suitability, or current availability. Each guide includes its own source list and collection date.

Our quantity calculators use the geometric formulas described in the calculation methodology. They are planning estimates, not purchasing recommendations.

Catalog source records (2)