The Kubota RD81943660 Bonnet Sponge is an authentic OEM replacement part designed for various Kubota B-Series compact tractors. This essential component helps to seal the engine bonnet, reducing noise and preventing the ingress of dust and debris into the engine compartment. Manufactured to Kubota's stringent quality standards, it ensures a precise fit and reliable performance, maintaining the original integrity and functionality of your tractor's engine hood assembly. Confirmed fitment across models like B2601HSD, B2301HSD, B2401DT, B2650HSD, and B3350HSD.