Features: brand new and high quality 2 Sizes: S length measures 45mm/1.77", L measures length 75mm/2.95". Large ring diameter 20mm/0.79" for both sizes. Easy to Use: Suitable for left or right hinge door, fixed with spring, convenient for cage opening and closing. Pull ring design, preventing pets from escaping. High Quality: These metal finger spring for latch hooks are of high elasticity, and the whole surface is galvanized, more durable. Package Includes: 10 pieces spring cage for latch door hooks. Wide Application: Applicable to all kinds of rabbit cages, chicken cages, duck cages, for pigeon cages, quail cages, parrot cages, rat cages and other pet biological cages. Specifications: Material: Metal Color: As Pictures Show Size: S-Approx. Length 4.5cm/1.77in, Ring Diameter 2cm/0.79in L-Approx. Length 7.5cm/2.95in, Ring Diameter 2cm/0.79in Weight: S-Approx.80g L-Approx.120g Package Includes: 10 Pieces Spring Hooks note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!