#18 Twisted Knotted Nylon 1-7/8" Square Mesh UV & Weather Treated Reinforced with a 5/16" rope border along perimeter. All orders are cut and made to order in the USA. The #18 gauge thread is roughly 1.9mm in diameter and is most commonly used for baseball and softball. All nets are UV and weather treated and have a tar finish for extra protection and durability. The #18 nylon net has a break strength of 190lbs and is great for little leaguers or younger. This net can be use for impact by younger ball players but is intended more as a barrier net. These nets will tend to last 3-5yrs left outdoors. All nets are hand made in the USA and are made to order.