Specifications: Check ball included for backflow prevention / spring included for DC prevention. Package size: W 3.5 x D 5.0 x H 0.7 inches (89 x 127 x 18 mm). Package weight: 1.4 oz (42 g). Ball diameter: 0.02 inches (0.5 mm). Body: UMN-152-07 jan: limited product. cute animal