Black Eagle Arrows Deep Impact Nock Collar 400 12 pack 1006057. Made from durable aluminum these lightweight collars are built for long-lasting performance and are easy to install or remove. Weighing just 2.6 grains each the green Deep Impact collars offer a perfect fit for 300 spine shafts and are a reliable affordable upgrade for any archer looking to maximize arrow lifespan and consistency. Specifications for Black Eagle Arrows Deep Impact Nock Collar 1006057: Manufacturer: Black Eagle Arrows Color: Green Features of Black Eagle Arrows Deep Impact Nock Collar: Made from durable aluminum Protects the nock end from impact damage Easy to install and remove Lightweight design at 2.6 grains each Sold in a 12-pack Package Contents: Black Eagle Arrows Deep Impact Nock Collar