Carbon Express Maxima Red SD Arrow - Each .400 Red/Black. The Maxima RED SD is a breakthrough in controlling Dynamic Spine in a smaller diameter (.203in ID) shaft. The high-tech carbon arrow shaft design has stiffer ends to contain the arrow's flex to what we call the RED ZONE. Specifications for Carbon Express Maxima Red SD Arrow - Each: Manufacturer: Carbon Express Color: Red/Black Quantity: 1 Length: 33 Weight: 0.09 lb Features of Carbon Express Maxima Red SD Arrow - Each Tri-Spine/RED ZONE Technology - Patented 3 spine arrow shaft with less than 1/3 the oscillation vs single spine arrow and FOUR TIMES the ACCURACY. SD - Small Diameter .203in ID maximum kinetic energy and greater penetration with less crosswind drift. BuffTuff Plus - Patented outer layer construction on the front 1/3 or 100percent high modulus carbon weave for excellent strength and spine consistency. BuffTuff - Patented outer layer construction on the middle 1/3 that provides the world s toughest and quietest carbon arrow finish plus makes it easier to remove from targets. Diamond Weave - Patented outer layer construction on the back 1/3 that provides ultimate stiffness and unparalleled spine technology. BullDog Nock Collars - Exclusive feature made of aircraft grade aluminum designed to prevent rear impact damage Laser Match Set - Pack sets are sorted and matched by spine and weight for best-in-class consistency. Spine sorting tolerance +/- .0025in and Weight sorting tolerance +/- 1.0 grains +/- .002 Real Straightness - Laser checked for straightness to remarkable 1/10000 of an inch our straightness standards are set as a max not an average like competitors. Launchpad Precision Nocks - Controlled arrow release and integrated shaft alignment for more consistent accuracy. Package Contents: Carbon Express Maxima Red SD Arrow - Each Carbon Express 50872: Maxima Red SD Arrow - Each .400 Red/Black