The Frabill Pro Thermal Tip-Up has a unique round shape and thick insulation covers the entire hole to prevent freeze-up, even at 25 F below! Seals the hole to keep blowing snow and slush out and blocks unnatural sunlight that can spook shallow water trophies. Features include: The Original Insulated Tip-UP. Comes in chartreuse for high visibility. Includes a #1677 Lil' Shiner Tip-Up light shaft in shaft design allows for re-greasing. Covers 10" hole Fits in 5-6 gallon bucket. Pre-lubed with Sub-Zero low temperature lubricant and dual trip settings, with a removable spool shaft.