4pcs Aquarium Biochemical Cotton Filter Blue Filter Cartridges Aquarium Tortoise Tank Carbon Filter Element Replacement for Aquarium Tortoise Tank Pond Canister Filters

• CAN BE REPEATEDLY: This filter cartridges can be repeatedly added to the filter box to enhance the filtering effect. Reuse can greatly reduce the cost of filtering water.
• EXCELLENT PVC PLASTIC: Manufactured with excellent PVC plastic, strictly follow factory quality control. A good filter accessory replacement, easy and simple to use, effectively improves water quality.
• DOUBLE-SIDED DESIGN: Double-sided design filtration, super adsorption, better performance and high reliability. Is your good helper for water purification.
• WITH SOME ACTIVATED CARBON: The interlayer contains a small amount of activated carbon, effectively helping clean the harmful substance.
• AFTER-SALES SERVICE: We are committed to providing customers with 100% satisfactory products and services. If you have any comments or suggestions, please contact us. We will serve you wholeheartedly.

Specification: Item Type: Extension Spring Specification: 15 Material: Iron Uses: Clothing accessories and peripherals Size: Approx. 3 x 3 x 1cm / 1.2 x 1.2 x 0.4in Size: Approx. 10mm / 0.39in 11mm / 0.43in 9mm / 0.35in 30mm / 1.2in Package List: 15 x Extension Spring