Seppi Offsetting Mulchers Offsetting and roadside mowers – attachments for tractors up 20 to 160 HP Learn More About Seppi Offsetting Mulchers at Seppi.com SMWA avs 40-90 HP Offsetting Mulcher. Mulcher with lateral, horizontal and vertical side shift. SMO avs 50-120 HP Offsetting Mulcher. Strong road side mulcher for any working position. SAV 80-150 HP roadside mulcher SAV. Offsetting mulcher for ditches and large areas.