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Amazon.com : Herm SPRENGER Ultra-Plus Prong Dog Training Collar, 3.0 mm x 18" Neck Size, 3.0 mm x 20" Chain Length, Steel Chrome Plated Dog Prong Collar, Pinch Collar for Dogs, Dog
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Amazon.com : Herm Sprenger Black Stainless Steel Prong Collar with Click-Lock Buckle and Nylon Loop - 2.25 mm x 16 inches : Pet Supplies
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