Hand Grip 1. Dia of spring: 4, 4.5, 5, 5.5mm 2. Material: steel spring, PP with foam handle 3. Color: different color choose Products Features:NameHand gripSerial NumberYRK-401ApplicationFor happy, For healthCharacteristicPopular in U.S.A, Canada, European countriesSpecificationMaterial----- steel spring, PP with foam handle Description----plastic handles, Dia of springs: 4mm,4.5mm,5mm,5.5mm Net ...