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 3.6m lengths.
Finish size is 98mm x 21mm
Also available in 1.5, 1.8 and 3 metre lengths on a separate page