Quick View Compare Mikasa W500 Promotional Mini Water Polo Ball, 6 Inch Diameter MSRP: $20.95 $13.35 The Mikasa Sports mini water polo ball, size 1.5 (6-inch diameter), is great for training or promotional use. Inflate to 4 PSI ✷ Item requires inflation ✷ Made in ThailandProduct FeaturesMikasa Promotional Water Polo Ball, W500Size | mini (6-inch... 0 Add to Cart