Aftermarket replacement for 1665706 SIMPLICITY 430 Belt for Blower, 4LK390 The outer fabric wrap is treated with highly oil and heat resistant, engineered synthetic rubber compound, specifically compounded for excellent wear resistance, proven through thousands of hours of testing. Oil and Heat resistant Belt Type-V Belt Top Width-21/32 in Material-Kevlar (Aramid) Outside Length-39 in Height-5/16 in Weight: 0..