https://www.trailer.parts/25-inch-Rubber-Roller-End-Cap-with-58-inch-Inner-Bore_p_5429.html
2.5 inch Rubber Roller End Cap with 5/8 inch Inner Bore-2375
2.5 inch Rubber Roller End Cap with 5/8 inch Inner Bore-This 2.5 inch Rubber Coned End cap is designed to mount on either end of a 12 inch Black Rubbe
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https://www.campkitonline.com/product/ctm-2925-truma-mover-roller-end-cap-60030-34700/
CTM 2925 Truma Mover Roller End Cap 60030-34700 | Camp Kit Online
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https://www.trailer.parts/25-inch-Rubber-Roller-End-Cap-with-58-inch-Inner-Bore_p_5429.html
2.5 inch Rubber Roller End Cap with 5/8 inch Inner Bore-2375
2.5 inch Rubber Roller End Cap with 5/8 inch Inner Bore-This 2.5 inch Rubber Coned End cap is designed to mount on either end of a 12 inch Black Rubbe
roller end cap
https://harsco-wheels.com/product-815.html
4inch Boat Trailer Yellow Poly Vinyl Bow Roller End Cap-Product Center-Harsco Trailer-Ningbo Harsco...