Hot-dip galvanised. Suitable for use in treated wood. 2.3 kg. Box No 811003 Type:Flat Slot Size 1/4" Inner Diameter 5/16" Outer Diameter 1.9cm Depth 0.1cm 0.2cm Piece Size 2.3kg Material Steel Finish Hot Dipped Galvanised Qty:745#811006:Type:Flat,Slot Size:5/16", Inner Diameter:3/8" Outer diameter 2.2 cm, depth 0.2 cm / 0.3 cm, piece size 2.3 kg, material: steel, surface: hot-dip galvanised. Quantity:435#811009:Type:Flat,Slot size:0.95cm,Inner diameter:1.1cm Outer diameter 2.5 cm, depth 0.2 cm / 0.3 cm, piece size 2.3 kg, material: steel, surface: hot-dip galvanised. Quantity:335 #811012:Type:Flat,Slot size:1/2" Inner diameter:1/2" Outer diameter: 3.5 cm, depth: 0.2 cm / 0.3 cm, piece size: 2.3 kg, material: steel, surface: hot-dip galvanised. Quantity:130#811015:Type:Flat,Slot size:1.6cm/0.63", Inner diameter:11/16", Outer diameter:4.5cm/0.3cm/0.4cm 2.3 kg. Material: steel. Surface: hot-dip galvanised. Quantity: 65