Tubeline COMING SOON! Sterling Equipment, Inc. is now a certified dealer for Tubeline Manufacturing! More information and products coming soon. Visit the Tubeline website here. Current Models: 2022 Tubeline Nitro 575RS Manure Spreader (Stk 5147) Read more 2023 Tubeline Nirto 750 Manure Spreader (Stk 5477) Read more