Description: Materials: TPR Length: 95mm/ 4 inches Small end inner diameter: 12.6mm/ 0.5 inch Large end inner diameter: 13.8mm/ 0.54 inch Prevent low pressure hose and fittings from deformation or damage. Specification: Works for 12.6mm low pressure hose protect Package Includes: 1 Piece Diving LP Hose protect Note: Hardness and softness will be influenced in different climate. If it's hard to fit on low pressure hose, you can boil the protect in boiled water for 5 minutes