1. Chen Guang (male & female; G): Chen Guang is one of the largest stationery manufacturers in China, among which the quality of sex pencils is stable and the price is moderate.

2.TrueColor: True color is a company specializing in stationery manufacturing, in which sex refills are cost-effective and suitable for daily use.

3. Parker: Although Baoke is an internationally famous brand, its gel refill has a good reputation in China market and the price is relatively close to the people.

4.Hobby (Ihoo): Hobby is a company specializing in stationery manufacturing, in which sex refills are cost-effective and suitable for daily use.

5. Delight: Delight is a well-known brand of office supplies, among which gel pen refills are moderately priced and reliable in quality.

6. Jinwanniers: Jinwannian is a company specializing in stationery manufacturing, in which the gel refill is cost-effective and suitable for daily use.

7.ThreeRivers: Three Rivers is an American stationery manufacturer, and its gel pen refills are of good quality and moderate price.

8. Beifa: Beifa is a domestic stationery manufacturer. The gel pen refill is cost-effective and suitable for daily use.

9. Swan: Swan is a German stationery manufacturer. Its gel pen refill is of good quality and moderate price.

10. Mitsubishi: Mitsubishi is a Japanese stationery manufacturer, among which gel pen refills are of good quality and moderate price.

In short, when choosing a neutral refill, you can choose the right brand according to your own needs and budget. At the same time, you can also pay attention to some promotional activities and get more favorable prices.