These Stretcher Bars are made in New Zealand and come in a variety of standard lengths. Each bar has precision machine mitred corners that slot together. The self-squaring design requires no gluing or nailing. Made from plantation timber from a renew-able source in New Zealand. The carefully selected knot-free, A grade, clear timber resists warping. The wood has been kiln-dried and is untanalised. Heavy Duty profile is 32mm x 42mm. May be framed or unframed. Bracing is recommended for HD profile on sizes 36" and over.