Product Overview The 10250T21LB is a 30.5mm 3-position water-tight/oil-tight non-illuminated Selector Switch with heavy-duty zinc die-cast construction. It has grounding nibs bit through paint and other coatings to provide secure ground. Drainage holes prevent build-up of liquid inside the operator which can prevent operation in freezing environments. Enclosed silver contacts with reliability nibs Diaphragm seals with drainage holes Grounding nibs on the operator casing Applications Industrial This listing is for Each.