Roho Low Profile Cushion Cover 18 x 20 Foam Mattresses wheel frame) 38 1 2 (980 Hip Kits wheel frame) 38 1 2 (980 mm) Height of chassis 6 (150 mm) Jar of 25 (10 small 10 med 5 Lrg) * Automatically positions and angles the implement correctly for use * Effective for teaching developmental * handwriting skills for grasp development * Provides stability while allowing a more manipulative grip * Offers extra control to overcome gripping difficulties arthritis and limited dexterity * Consists of 2 linked rings * Place finger or thumb in the larger ring and the implement to be used inside the smaller ring Standard Replacement Covers for the folowing cushions: * ROHO© Single Compartment (HIGH MID LOW PROFILE) * ROHO© Dual Compartment (HIGH MID LOW PROFILE) * ROHO© ENHANCER© * ROHO© MOSAIC© * The ROHO© Standard Cushion Cover is a textile enclosure intended to protect the cushion * 18 x20 * Low Profile * 6 Month Limited Warranty