【Professional Design】Car audio passive crossover is reasonable wiring, nice components to ensure the right sound to enhance your experience, very practical. You can buy and use with confidence. | 【Improve Bass Sag】The crossover consists of bass inductor and magnet, which can improve bass sag and locate solderless plug in socket. | 【Premium Material】High gloss double layer heat dissipation ABS plastic housing, exquisite workmanship and very careful materials. Simple structure, and reliable, you can use it for a long time. | 【 to Use】The car audio crossover has excellent sound amplification tool with overcurrent can ensure use and reliable use. Please choose to buy according to actual needs. | 【Convenient to Use】The car speaker frequency divider is easy to use, connect the corresponding line, you can immediately tighten. Bring you a comfortable and convenient use experience.

Focusing Problem Elimination: M48 extension tube, the extension tube has M48 female thread and M48 male thread, which is used to solve the spacing problem in astrophotography and eliminate a series of focusing problems. | Type: Astronomic telescope M48 threaded extension tube, the height of the extension tube is 3mm, 5mm, 7mm, 10mm, 12mm, 15mm, 20mm and 30mm. | Aluminum Alloy Material: All metal structure and anodized aluminum process, durable, using this extension tube can obtain the correct image scale or the precise spacing required by the reducer or field flattener. | Variable Combination: The required spacing can be achieved by combining several extension rings of different lengths, you can use 1, 2, 3 or 8 extension rings as required. | Eliminate Redundant Light: Astrophotography camera tube, the design of female thread can eliminate stray light and reflected light, making the image clearer and more perfect.