Cotterman Ladder Caster Kit: For Rolling Ladders, Swivel, 4 Casters, 2 in Wheel Dia, Casters [PK/4] Model: SU2539

Werner Ladder Caster Kit: For Stepladders, Swivel, 2 Casters, 4 in Wheel Dia, Casters Model: 40-2HD

Cotterman Ladder Caster Kit: For Stepladders, Swivel, 4 Casters, 2 in Wheel Dia, Casters [PK/4] Model: SU9094

Real Fancy 4.3" Heavy Duty Gate Wheel - Gate Caster With Spring Loaded Gaster, 360° Swivel Rubber For Wooden/Barn Gate, Rust-Resistant Outdoor Gate

4 in. Spring Loaded Gate Caster Set - 350 Lbs Capacity No Hardware

Vestil | Spring Loaded Caster Double Sided Ladder - 2 Step - No Handrails - Vestil | Grip Strut / 30"