Available in 4 different weights: 50, 75 & 100 grains in stainless steel and 20 grains in aluminum. Insert info: Sold in 12 Pc Packs Made for the WWA .204 inner diameter arrows. SUS300 stainless steel or high grade aluminum. 5/16″ Outside outer diameter fits our precision field points perfectly. 20 grain – 1 1/8″ in total length in black anodized aluminum. 50 grain – 1 1/16″ in total length in stainless steel. 75 grain – 1 3/8″ in total length in stainless steel. 100 grain – 1 7/8″ in total length 5 Inside Outer Diameters available (This is the portion of the insert that fits the outer diameter of the arrow.): .278″ – Fits Ranger 350 spine and Mesa 250 & 300 spines. .270″ – Fits Ranger 400 spine and Mesa 350 & 400 and New Ground 250 .264 “- Fits Ranger 500 & 600 spine .258″ – Fits New Ground 300 & 350 .250″ – Fits New Ground 400