Based on this product's specifications, here are some alternatives and similar models
Cable gland OBO Bettermann 2955 F/M20 flame retardant, white
Summary description:
OBO Bettermann 2955 F/M20 is a flame-retardant cable gland in white finish for securing and sealing M20 cable entries. Designed to provide mechanical strain relief and protection against dust and basic environmental exposure, it is suitable for electrical installations where fire safety and reliable cable fixation are required. Ideal for panels, junction boxes and equipment housings.