Product Description Nutlock Female Adapter Nut Lock fittings for easy and water tight connection. Available in 2 sizes. 16mm – 3/4″ 20mm – 3/4″ Materials: Body and nut PP, Grip PBT Threads: BSPT Max. working pressure: 10kg/cm2 Fertilizer resistant All 16 sizes fit also 17 sizes Wall thickness: 16-17mm: 0.7 1.5mm, 20mm: 0.9 2.0mm, 25mm: 1.4 2.0mm