Feature: 1. Designed for air compressor, this valve plate set will surely improve the working efficiency of the machine. 2. Including a tongue shape valve plate and a V shape plate, ideal accessories for changing and replacing. 3. All the air compressor parts have excellent quality and toughness for better working performance. 4. Perfectly adapt to low cycle thermal fatigue damage, high cycle thermal fatigue damage and creep damage. 5. Made of preimum cast iron, very durable for long-term using, and very easy to install. Specification: Item Type: Air Compressor Valve Plate Product Material: Cast Iron Application: Air Compressor Accessory Hole Distance Of Total Pore-Forming: 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 Shape Plate Positioning Hole Distance: Approx. 50mm / 2in Applicable Cylinder Head: 3/8in Thread (Outer Diameter 16). Package List: 1 x Board1 x Plate2 x Locating Pin