Nylon fittings are tough and great for water well, underground, barns, livestock and watering systems. These are not ideal for applications exposed to sunlight as ultraviolet rays will cause fittings to become brittle. Boshart Industries Coupling, Lead-Free, Fitting/Connector: Coupling, 1/2 in Nominal, Insert End Style, 3.45 in Length, Nylon, 0.6 in W x 0.7 in H Dimensions, Import