Check the listing for details. Bathtub To Shower Step-Through Conversion Kit. Color: White, Condition: New. Listed at 225.00 USD. Make your bathtub safer and more accessible with this Bathtub To Shower Step-Through Conversion Kit. This kit comes with everything shown in the second picture- the bathtub insert, anti-slip safety treads, caulk, wood, and a detailed step-by-step installation guide. There are 3 sizes- Small, Medium, and Large. Dimensions for each are available upon request. The Medium size will be shipped if no size is specified. Refunds are available up to 30 days after purchase.Make your bathtub safer and more accessible with this Bathtub To Shower Step-Through Conversion Kit. This kit comes with everything shown in the second picture- the bathtub insert, anti-slip safety treads, caulk, wood, and a detailed step-by-step installation guide. There are 3 sizes- Small, Medium, and Large. Dimensions for each are available upon request. The Medium size will be shipped if no size is specified. Refunds are available up to 30 days after purchase.