Replacement Aftermarket belt for 10737 ATLAS 12-5013 Belt Top Width: 1/2 in Weight: 0.19 Height: 5/16 in Length: 29 in inside, 31 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