You know you're getting strong, durable timber with this top quality New Zealand Pine swing set. The timber is ACQ (Alkaline Copper Quaternary) treated. ACQ is the preferred treatment for timber used in environmentally sensitive areas. It gives the timber long-term protection against rot, fungal decay, and insect attack. All steel parts are double galvanised and powdercoated which will keep them rust-free inside and out, so that they'll last ages! The seats on this swing are easily height adjustable so both big kids and little kids can enjoy it! Finally we've applied water-based acrylic lacquer to the timber to give it extra protection against the elements as well as a nice, smooth finish.