The Snapper 21" Ninja Mulching Blade #24234 is a brand new high-quality lawn mower part designed for Snapper brand lawnmowers. Made of durable steel material, this black mulching blade is 21" in height and compatible with Snapper models. With a center hole diameter of 3/8", this blade is perfect for efficiently mulching and cutting through grass in your yard or garden. Plus, with free shipping included, it's a convenient and cost-effective option for maintaining your lawn.