Replacement Aftermarket belt for 21865 DYNAMARK 1334-04 Belt, W/26" Belt O.C. Top Width: 1/2 in Weight: 0.16 Height: 5/16 in Length: 24 in inside, 26 in Outside Material: Dry wrapped aramid cord Recommended use: Higher horse power uses and are designed to increase strength and stability and are also designed to have a smoother grip. The material helps resist humidity, high temperatures, oil and cracking