For Air Compressor - Designed for air compressor, the valve plate set will surely improve the working efficiency of the machine. Tongue & V-Shaped Plate - Includes tongue-shaped valve plate and V-shaped plate, ideal accessories for changing and replacing. Cast Iron - Made of premium cast iron, very durable for long-term use and very easy to install. Adapt to Fatigue Damage - Perfectly adapt to low-cycle thermal fatigue damage, high-cycle thermal fatigue damage and creep damage. Excellent Toughness - All parts of the air compressor have excellent quality and toughness for better working performance. Specifications: Item Type: Air Compressor Valve Plate Product Material: Cast Iron Application: Air Compressor Accessory Total Pore Forming Hole Distance: Approx. 48 x 72mm / 1.9 x 2.8in Tongue Plate Positioning Hole Distance: Approx. 20mm / 0.8in Tongue Plate Length: Approx. 57mm / 2.2in V-shaped Plate Positioning Hole Distance: Approx. 50mm / 2in Applicable Cylinder Head: 3/8in Thread (Outer Diameter 16) Package List: 1 x Board 1 x Plate 2 x Locating Pin