4169 - 4170: 产品细节图：[展示塑料组合试管架的图片] 产品性能：组合式设计，可根据需要调整。 用材：PP塑料，耐腐蚀。 参数表： 型号：ASL-6-15 - ASL-4-10 孔数：φ13mm90孔（6-15）、φ16mm60孔（5-12）、φ20mm*40孔（4-10） 型号：ASL-6-15 - ASL-4-10 用途：用于放置不同规格的试管，整理实验器材。 包装：单个包装，方便使用。 使用说明：按照试管尺寸插入相应孔中。 售后服务：提供售后保障，如有问题可及时处理。 Product Details Image: [Show the picture of the plastic combined test tube rack] Product Performance: Combined design, can be adjusted according to needs. Materials Used: PP plastic, corrosion-resistant. Parameter Table: Model: ASL-6-15 - ASL-4-10 Number of Holes: φ13mm90 holes (6-15), φ16mm60 holes (5-12), φ20mm*40 holes (4-10) Model: ASL-6-15 - ASL-4-10 Usage: Used to place test tubes of different specifications and organize experimental equipment. Packaging: Individually packaged for easy use. Instructions for Use: Insert into the corresponding hole according to the size of the test tube. After-sales Service: Provide after-sales guarantee, and any problems can be dealt with in time. 4171 - 4173: 与4168 - 4170类似，不同之处在于孔数和型号。 Similar to 4168 - 4170, the difference is the number of holes and model.