The trimmer replacement spool is compatible with Worx string trimmer and utilizes centrifugal force to feed the trimmer line as it is needed. Convenient, fast and efficient. If you would like to have spare spools and spool covers, it is your good choice. Features: Available to stretch and cushion on impact with hard surfaces. Allow less drag for more efficient cuts. Have durability and flexibility for longer life. Good working condition, easy to install. Type 1 is a great replacement for Worx WA0010 Trimmer, Type 2 is a great replacement for Worx GT Cordless Trimmer. Specifications: Type: 1, 2 (optional) Item Detail: Type 1: 6 * Line Spools + 1 * Spool Cap Covers (for Worx WA0010 Trimmer) Replace part number: 50006531 Type 2: 6 * Line Spools + 2 * Spool Cap Covers (for Worx GT Cordless Trimmer) Replace Line Spools Part Number: WA6531 Replace Spool Cap Covers Part Number: WA0010 Package size: 200 * 150 * 50mm / 7.87 * 5.9 * 1.97in Package weight: 100g / 3.53ounces (type 1) 110g / 3.88ounces (type 2) Note:The real color of the item may be slightly different from the pictures shown on website caused by different factors, such as brightness of your monitor and light brightness. Package List: Type 1: 6 * Line Spools 2 * Spool Cap Covers Type 2: 6 * Line Spools 1 * Spool Cap Cover