The CB-2000 is an innovative design for today's active man. The material is a highly durable plastic made of Polycarbonate. The strength of this material exceeds that of acrylic and many other plastic blends. The CB-2000 consists of 2 parts: Ring 'A': Is a round design eliminating any pinching or chaffing while being worn. There is a center recessed hole that accepts the locking pin. There are two side holes that accept the guide pins from the 'B' ring. The guide pins are designed to take the torque when one becomes erect. The 'A' ring comes in five different sizes: 1 1/2" I.D., 1 5/8" I.D., 1 3/4" I.D., 1 7/8" I.D. and 2.0" I.D. The five 'A' rings are included with each order. This helps to eliminate the need to find an exact size. Ring 'B': Again, is a round design. The 'B' ring has 2 guide pins that feed into the 'A' ring. The locking pin feeds from the 'A' ring through the 'B' ring and accepts either a small brass padlock or plastic lock for security. Rings 'C' and 'D': These two rings are connected by way of bars that connect to the 'B' ring. Rings 'B', 'C' and 'D' make up one complete unit. This cage portion encases the penis and attaches to the 'A' ring. Ring 'D': Two small bars go across the bottom of Ring 'D'. This prevents manual stimulation while still allowing use at the urinals. The Center Length of the Cage Portion is 2 1/2". The inside diameter is 1 1/2". Please take the size into consideration when ordering. Weight..CB-2000 weights less than 2 1/2 ounces completely assembled with the plastic lock. Various sized spacers are provided for the purpose of security and comfort according to the individual need. Locks: Brass Padlock: A durable brass padlock with 2 keys is provided with each order. Plastic Locks: Each order receives 5 plastic locks. Each lock is individually numbered to assure tamper proof. Once the plastic locks have been engaged the only method of removal is to cut the lock itself, they cannot be re-attached or glued back in place. Each CB-2000, CB-3000 and The Curve come in a beautiful stamped Gift Box. The product is wrapped in tissue paper. The perfect gift... that keeps on giving!