Japanese 420J2 Rockwell-C hardness: 57

Insulated down to -58°F (-50°C) it is the best choice for those out in all weather conditions

The SDS Micro Tips offer additional flexibility in fly depth control in a range of varying fishing conditions

we've incorporated ultra-durable Delrin inserts to protect the muzzle of your rifle or shotgun from unexpected impacts or scrapes under rigorous range conditions

Weaver #19 Base Serge Boulard Inc. Japanese 420J2 Rockwell-C hardness: 57Product Features Each Weaver base is machined to tight tolerances for a custom fit. These Aluminum bases offer maximum strength for rings to hold tight. * Item Not Exactly As Pictured * Refer to Weaver Base Chart at www. weaveroptics. com To Insure Correct Base To Fit Your Firearm.