Description:  Product Name: Resistance Pin Bending Tool Set Product Material: PLA Plastic Product size: Large size: 7.7 * 3.3 * 0.5/3.03in * 1.3in * 0.197in Small size: 7.6 * 2.9 * 0.4/2.99in * 1.14 in * 0.157in Feature: Safety & Stress Reduction Provides shelter for timid fish (loaches, catfish) and molting shrimp to escape aggression, strong light, and currents. Safe materials (e.g., PETG plastic) ensure no harmful chemicals leach into the water. Natural Behavior & Environmental Enrichment Encourages exploration, patrolling, and play in bottom-dwelling species (plecos, corydoras). Mimics natural habitats, reducing stress and promoting natural instincts. Enhanced Viewing & Interactive Experience Unique tunnel designs allow observation of fish/shrimp behaviors from multiple angles. Adds aesthetic appeal to aquascapes while offering functional hiding spots. Easy Installation & Maintenance Bottom-sinking or glass-fixed designs ensure stability without deep substrate embedding. Simple setupno glue or complex steps required. Community Tank & Breeding Support Multi-entrance caves allow multiple fish/shrimp to share space peacefully. Micro-mazes protect baby shrimp, improving survival rates in breeding tanks Note: 1.Due to manual measurement, there may be a 1-3mm error in product dimensions. 2.The color of the product may have errors due to objective reasons, and the actual product is the main focus.  The product includes: Packing List:  1 xResistance Pin Bending Tool Set