100mm x 22mm (4" x 1") is a highly versatile size of treated timber, where durability is key but a smooth appearance and structural strength isn't necessary. Often used in garden project such as path edging and shed construction.
Comes pressure treated.
Available in 3.9m and 4.2m lengths.
Finish size is 98mm x 21mm
Also available in 1.95m and 2.1m lengths on a separate page.