Replacement Aftermarket belt for 7540438 ACE HARDWARE 21A-415A Belt for Drive Top Width: 1/2 in Weight: 0.31 Height: 5/16 in Length: 49 in inside, 51 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