1. Of durability. 2. Made of good materials, durable and practical. 3. Exquisite and delicate, well - matched with the original equipment. 4. The automatic feeding system replaces the spool, which helps save the time of manually winding the lawn mower cord. 5. The spool cap can protect the lawn mower cord and keep it fixed on the lawn mower. 6. Sturdy and durable, with a relatively long service life. 7. Easy to install and reliable to use. Specifications: 1. Dimensions: Spool diameter is about 1.65 mm, length is about 12.2 m. 2. Compatible models: Suitable for some models like Black & Decker GL315, GL350, GL650, GL337SB, GL546SC, GL650SBC, GL651SB, GL652, GL653, GL65, GL656, GL660, GL670. 3. Color: As shown in the picture. Precautions: 1. Due to various factors such as monitor brightness and light brightness, the actual color of the product may have a slight difference from the pictures shown on the website. 2. Slight errors in the data from manual measurement are acceptable. Packing list: 2 spools