K1)Stepped Normal Valve, PE K2)Stepped Normal Valve, Thin paper K3)Stepped Tubular Valve, PE K4)Stepped Tubular Valve, Thin paper
u + l : 14 - 21 cm u1 : 2 cm u : 6,5 - 8 cm c: 5 - 7 cm b : 7 - 22 cm l1 : 12 - 19 cm
