Our Snap-on protectors fit on standard 66-type punchdown blocks, and are generally used on the phone company's RJ21X demarcation.
	
Each Snap-on protects one pair of wires (for one phone line), and bridges across the center of a split block.
	
A grounding bar connects to multiple Snap-ons on the punchdown block.
	
Two versions are available: 130 Volt for central office lines, and 30 Volt for use within a phone system, where you have phones in several buildings.
	
Color may vary from photo.
	
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