Grinding Stick - TOOGOO(R) Double Ended Wooden Grip Valve Grinding Stick Lapping Tool Set 2 Pcs Product Name: Valve Lapping Stick; Color: Black, yellow Material: Plastic,Wooden; Total Length: 22.5cm/9", 21cm/8" Handle Dia: 17mm/0.7", 23mm/0.9" Suction Cup Dia: 2cm, 1.5cm; 2.8cm,3.5cm