GYMNASTIC WOOD RINGSSPECIFICATIONS & FEATURES:RING MATERIAL: BIRCH;STRAP MATERIAL: NYLON;RING DIAMETER: 23CM;RING THICKNESS: 28MM;STRAP WIDTH: 2.5CM;STRAP LENGTH: 4.6M;TOTAL WEIGHT: 1.5KG;STRAP: BLANK, OR WITH SCALES;LOGO: CUSTOMIZED BY LASER.