3 This joist set is a practical accessory for the application under the decking. The decking keel is made of wood-plastic composite, so it does not require additional treatment like oiling or painting. The joist is very durable and resistant to rot or rust. It is a useful accessory for installing decking boards. Colour: Black Material: WPC Dimensions: 170 x 3 x 4 cm (L x W x T) Assembly required: No Delivery contains: o8 x Joist Free Delivery SKU: 149006 Delivery is 6-7 working days IF YOU PURCHASE WITH PAYPAL, PLEASE SEND US A MESSAGE THAT YOU BOUGHT A PRODUCT.