1.Diameter of the spring: 4mm, 4.5mm, 5mm, 5.5mm 2.Handle: plastic, eva foam, 3.Colors: at customers' option 4.MOQ: 2000pcs 1.Diameter of the spring: 4mm, 4.5mm, 5mm, 5.5mm 2.Handle: plastic, eva foam, 3.Colors: at customers' option4.MOQ: 2000pcs5. Delivery date: within 15days after get deposit eva foam hand gripper for finger exerciser