Crystal Tip Comparison Chart         Crystal Tip | Seal-Tight | Safe-Tip EZ | Sani-Tip | Spree | Pro-Tip | Metal Tip   Proprietary Adapter NO YES NO YES NO YES NO   Interchangable with Metal Tips YES NO YES NO YES NO YES   Can Use Other Disposables YES NO YES NO YES NO YES   Freedom to Choose YES NO YES NO YES NO YES   Available in Variety of Colors YES NO NO NO NO NO NO   Same Length as Metal YES NO NO NO NO NO YES   Shorter than Metal NO YES YES YES YES YES NO   Can Visually see Air Chamber YES NO NO YES NO NO NO   Free Adapters YES NO NO NO NO NO NO   Lifetime Support Program YES NO NO NO NO NO NO   Double for Free Program YES NO NO NO NO NO NO   Available Direct or Dealer YES NO NO NO NO NO NO   Has O-Ring Tip Lock YES NO YES NO YES NO YES   Has Dedicated Air Water Chambers YES YES YES YES NO YES YES   Has Dual Body Construction YES YES YES NO NO YES YES   Has Competitive Upgrade Program YES NO NO NO NO NO NO   Has Customer Loyalty Program YES NO NO NO NO NO NO   Has Customer Rewards Program YES NO NO NO NO NO NO