Stainless Steel Ice Lock Bondage Time Release Locking Device. 
SIZE SMALL DETAILS:
Size: Small
Total Length: 7" / 17.78 cm
Flask Length: 3.5" / 8.89 cm
Circumference: 6.5" / 16.51 cm
Estimated Locking Time: 45mins (depends on environment and temperature conditions)
Ring Diameter: 1.25" / 3.18 cm
Weight: 1.3 LB
Model: 2030-S-SS
Finish: Stainless Steel

SIZE LARGE DETAILS:
Size: Large 
Total Length: 9.5" / 24.13 cm
Flask Length: 6" / 15.24 cm
Circumference: 6.5" / 16.51 cm
Estimated Locking Time: 2 hours (depends on environment and temperature conditions)
Ring Diameter: 1.25" / 3.18 cm
Weight: 2 LB
Model: 2030-L-SS
Finish: Stainless Steel

A perfect item great for various bondage restraints. Fill the flask with water,  insert the pin and put it into the freezer until frozen solid. Item won't release until ice has melted.

Can last between 45 minutes and 2 hours (Size Small and Size Large) depending on how warm the room is and how much water is in the flask.

Please Note: It is recommended to test item and thaw in your usual environment before putting it to proper use for an approximate release time.