Lola's Limited Secret Powers Training Collar (2.3 mm, 12 prongs; Short Fur, 20.5"-24" Neck) Machine washable Quality prongs (round-tip or square), individually removable prongs  use all or none No prongs in trachea area and prongs point away from trachea Easy on/easy off; flip it inside out to slide on/off, no squeezing of stiff prongs Hand-made in USA