Silver Spring Bath Board - Comfortable non-slip seating surface. Adjustable footrests grip bathtub rim (17. 75" - 28"). Requires a bathtub rim at least 1. 25" deep on both sides. Built-in soap dish and drain holes. Helps ease bathtub transfer. Silver Spring Bath Board * Comfortable non-slip seating surface * Adjustable footrests grip bathtub rim (17.75" - 28") * Requires a bathtub rim at least 1.25" deep on both sides * Built-in soap dish and drain holes * Helps ease bathtub transfer