Elemento scorrevole. Modelli: HS 61 HS 246 HS 75 HS 80 HS 85 HL 75 K HL 75 FH 75 HL-KM 0° HL-KM HL 0° - 90° HL-KM 0° - 90° FH 0° - 90° FH-KM 0° - 90° HL 135° HL-KM 135° FH-KM 135° FH 135° HL 0° PC 70 HL 100 K HL 100 HL 95 HL 95 K HLE 71 K HLE 71 HEL 600 K HEL 600 HEL 700 K HEL 700 HG 100 HG 300 HG 900