Dimension: Ø250x234mm / Weight: 22.5 Kg (50 Lbs) Rubber: NBR (Nitrile) / Cast Metal: SG Iron GGG 40 (EN-GJS-400-15) Application: Truck Mounted concrete pump models -S 31 XT, S 36 X , S 38 SX, S 39 SX, S 42 SX, S43 SX, S 46 SX, S 47 SX, S 52 SX, S 55 SX, S 58 SX, S 61 SX , S 65 SXF (Pump Kit P 2025, P 2525)